Equivalent Ratios

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that expresses the same relationship between two quantities, even if the numbers are different. For example, 1:2 and 2:4 are equivalent ratios.

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, you can multiply or divide both terms of the ratio by the same non-zero number.

Front

What is the ratio of 9 to 4?

Back

The ratio of 9 to 4 is written as 9:4.

Front

If you multiply both terms of the ratio 2:5 by 4, what is the new ratio?

Back

The new ratio is 8:20.

Front

What number should go in the blank to make the ratios equivalent? 3 : 8 __?_: 48

Back

The answer is 18.

Front

What is the relationship between the ratios 30:24 and 5:?

Back

To find the missing number, you can set up a proportion: 30/24 = 5/x, which gives x = 4.

Front

If the ratio 1:5 is equivalent to __?_: 20, what is the missing number?

Back

The missing number is 4.

Front

What do you multiply by to get from 9:4 to 45:20?

Back

You multiply by 5.

Front

What do you multiply by to get from 2:5 to 8:20?

Back

You multiply by 4.

Front

If two ratios are equivalent, what can you say about their cross products?

Back

The cross products of equivalent ratios are equal.