Cómo encontrar fracciones equivalentes de 3/5 y 1/4

1. Understanding Equivalent Fractions

Understanding equivalent fractions is an important concept in mathematics.


In order to understand equivalent fractions, it is necessary to know what a fraction is. A fraction represents a part of a whole or a division of a quantity into equal parts.

An equivalent fraction is a fraction that represents the same value as another fraction, but with different numerator and denominator values.

The numerator of a fraction represents the number of parts being considered, while the denominator represents the total number of equal parts in the whole.

To determine if two fractions are equivalent, you can simplify or reduce them. Simplifying a fraction involves dividing both the numerator and denominator by their greatest common factor.


For example, the fractions 2/4 and 1/2 are equivalent because they represent the same value. To simplify 2/4, we divide both the numerator and denominator by 2 to get 1/2.

There are also different strategies to find equivalent fractions. One way is to multiply or divide both the numerator and denominator by the same number. This does not change the value of the fraction, but it changes the way it is represented.


For example, to find an equivalent fraction to 1/3, we can multiply both the numerator and denominator by 2 to get 2/6.

Understanding equivalent fractions is important for a variety of mathematical operations, including addition, subtraction, multiplication, and division of fractions. When working with fractions, it is often necessary to find equivalent fractions in order to perform calculations.

Overall, understanding equivalent fractions is essential for developing a strong foundation in mathematics. It allows for better comprehension and problem-solving skills when working with fractions. So, take the time to grasp this concept and practice finding equivalent fractions!

2. Simplifying Fractions

When it comes to fractions, simplifying them can make calculations and comparisons easier. Simplifying a fraction means reducing it to its lowest terms, where the numerator and denominator have no common factors other than 1.

To simplify a fraction, you need to divide both the numerator and denominator by their greatest common divisor (GCD). The GCD is the largest number that evenly divides both the numerator and denominator.

Let’s take an example: 3/9. We can simplify this fraction by finding the GCD of 3 and 9, which is 3. Divide both the numerator and denominator by 3 to get 1/3. This is the simplified form of the fraction.

It’s important to note that not all fractions can be simplified. If the numerator and denominator don’t have any common factors other than 1, the fraction is already in its simplest form.

A helpful method to find the GCD is to factorize the numerator and denominator. List the prime factors of each number and find the common factors. Multiply the common factors together to get the GCD.

For example, let’s simplify the fraction 8/12. The prime factors of 8 are 2 * 2 * 2, and the prime factors of 12 are 2 * 2 * 3. The common factors are 2 * 2, which equals 4. Divide both the numerator and denominator by 4 to get 2/3. This is the simplified form.

By simplifying fractions, we can make them easier to work with in mathematical operations like addition, subtraction, multiplication, and division. It also helps in comparing fractions and finding equivalent fractions.

So, the next time you encounter a fraction, remember to simplify it to its lowest terms for easier calculations and comparisons!

3. Multiplying and Dividing by the Same Number

When solving equations or performing mathematical operations, it’s important to understand the concept of multiplying and dividing by the same number.

This concept states that if you multiply or divide both sides of an equation by the same number, the equation remains balanced.

Example 1:

Let’s consider the equation 4x = 12. To solve for x, we can divide both sides of the equation by 4.

This gives us: x = 3

By dividing both sides by 4, we isolated the variable x and found its value.

Example 2:

Now, let’s look at the equation 2a + 5 = 15. To solve for a, we can subtract 5 from both sides to isolate the term with the variable.

This gives us: 2a = 10

To find the value of a, we need to divide both sides of the equation by 2.

This gives us: a = 5

By multiplying or dividing both sides of an equation by the same number, we maintain the equality and can solve for the unknown variables.

This concept is also useful when simplifying expressions. For example, if we have the expression 6x + 12x, we can factor out the common factor of x.

This gives us: x(6 + 12)

The same concept applies to division. If we have the expression 10y / 5, we can simplify it by dividing both the numerator and the denominator by 5.

This gives us: 2y

In summary, multiplying and dividing by the same number allows us to solve equations, isolate variables, and simplify expressions. It’s an important concept to master in mathematics.

4. Cross Multiplication

In mathematics, cross multiplication is a method used to find the value of an unknown variable in a proportion equation. It is commonly used when comparing two ratios.

Cross multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio, and vice versa. The resulting products are set equal to each other, and then the unknown variable is solved for.

For example:

  • Given the proportion equation 2/5 = x/10, we can use cross multiplication to find the value of x.
  • Cross multiplying, we get: 2 * 10 = 5 * x
  • Simplifying, we have: 20 = 5x
  • Dividing both sides by 5, we find: x = 4

Therefore, in this case, x would be equal to 4.

Cross multiplication is a useful technique for solving proportion equations quickly and efficiently. It allows us to find the value of an unknown variable without solving for all the other variables in the equation.

5. Using an Online Fraction Calculator

In today’s digital world, there is no shortage of online tools and resources available to make our lives easier. One such tool that comes in handy for students, professionals, and anyone dealing with numbers on a regular basis is the online fraction calculator.

What is an Online Fraction Calculator?

An online fraction calculator is a web-based tool that allows users to perform various operations with fractions. With just a few clicks, users can add, subtract, multiply, and divide fractions effortlessly.

Why Use an Online Fraction Calculator?

The convenience and ease of use are the primary reasons why people opt for an online fraction calculator. Unlike traditional calculators, which may require manual conversions and tedious calculations, online fraction calculators save time and effort by providing instant and accurate results.

How to Use an Online Fraction Calculator?

Using an online fraction calculator is as simple as it gets. Here’s a step-by-step guide to get you started:

  1. Access the Online Fraction Calculator: Open your preferred web browser and search for an online fraction calculator. There are numerous options available, so choose one that suits your needs.
  2. Enter the Fractions: Once you have the calculator open, enter the fractions you want to work with. Input the numerator and denominator for each fraction in their respective fields.
  3. Choose the Operation: Select the operation you want to perform (addition, subtraction, multiplication, or division).
  4. Click Calculate: After inputting the fractions and choosing the operation, click on the calculate button.
  5. View the Result: The online fraction calculator will display the result instantly. You can view the answer as a fraction or a decimal, depending on your preference.

Benefits of Using an Online Fraction Calculator:

  • Accuracy: Online fraction calculators perform calculations with utmost precision, reducing the chances of errors.
  • Time-saving: With instant results, online fraction calculators save a considerable amount of time compared to manual calculations.
  • Convenience: Online fraction calculators are accessible anytime, anywhere, as long as you have an internet connection.


Whether you’re a student struggling with fractions or a professional in need of quick calculations, an online fraction calculator can be a valuable tool. Its ease of use, accuracy, and time-saving capabilities make it a must-have for anyone working with fractions regularly.