How to cross multiply fractions with variables?

If you have a fraction with a variable in it, say you want to cross multiply it with another fraction. You might be tempted to just replace the variable with another fraction, but that won't work. You need to find a common denominator for the fraction with the variable and the fraction you want to cross multiply it with.

How to multiply fractions with variables?

If you have two fractions with the denominators being the same number, you can easily multiply them together. However, if you want to multiply fractions with variables that are in the denominator, you will need to find a common denominator. A common denominator is a number that is the product of all the numbers in the denominators.

How to solve a fraction with variables?

When solving a fraction problem with variables, you will need to find the total amount of each fraction’s denominator to determine the value of each fraction. For example, if you are given the following fraction problem:

How to cross multiply and solve with fractions?

As you can see, the fraction multiplication is the same as the simplest addition of two fractions with the same denominator. To find the result of the cross multiplication, you need to find the common denominator and add up the numerators.

How to solve for variable in a fraction?

Sometimes, you'll be given a fraction with variables in it. You won't know the value of each variable beforehand, but you can still solve the equation. A great way to solve for the variable is with fraction cross multiplication. You first need to create a fraction with the unknown as the denominator. To do this, write the denominator (which in this case is the variable) as a fraction with the lowest denominator that is larger than the unknown. In our example, we'd write