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# Can you cross multiply to compare fractions?

## Can you cross multiply to compare fractions?

You can use cross-multiplication to compare fractions and find out which is greater. When you do so, make sure that you start with the numerator of the first fraction. To find out which of two fractions is larger, cross-multiply and place the two numbers you get, in order, under the two fractions.

Does cross-multiplication always work to compare fractions?

No, you cannot cross multiply when adding fractions. Cross multiply only when you need to determine if one fraction is greater than another, or if you are trying to find a missing numerator or denominator in equivalent fractions.

### Why does cross-multiplication compare fractions?

By comparing fractions using cross-multiplication, we lose the concept of finding equivalent fractions, which is ​why ​cross-multiplication works. This property states that if we multiply both sides of an equation or inequality by the same number, the values of each side remain equal.

What does it mean to cross multiply fractions?

intransitive verb. : to clear an equation of fractions when each side consists of a fraction with a single denominator by multiplying the numerator of each side by the denominator of the other side and equating the two products obtained.

## How to compare two fractions using cross multiplication?

Compare 3 ⁄ 7 and 5 ⁄ 8 using cross-multiplication. To compare two fractions with different denominators, we make their denominators the same. We do it by changing the denominators to the product of both the denominators.

When do you use cross multiplication to find the numerators?

So, the denominator of both the fractions becomes 7 × 8 = 56 Now, we use cross-multiplication, to find the numerators. First, we multiply the numerator of the first fraction with the denominator of the second fraction. So, the first fraction becomes: 24 ⁄ 56

### When do you use a cross multiply method?

Cross-Multiply Definition When two fractions p q p q and r t r t are multiply by each other is termed as cross-multiplication method. In the cross-multiplication method, the numerator of the first fraction value is multiplied by the denominator of the second fraction. It can be termed as a cross-multiplication method or a cross multiply.

When is a fraction more than half of the denominator?

If the numerator is more than half of the denominator, then the fraction is more than ½. While if the numerator is less than half of the denominator, the fraction is less than ½. , because 4 is half of 8. Therefore, than half of 8.