Ratios and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, expressed as 'a to b' or a:b.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, you can use cross multiplication.

Front

What is cross multiplication?

Back

Cross multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

Back

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

How can you find a missing value in a proportion?

Back

You can find a missing value by setting up the proportion and using cross multiplication.

Front

What is the first step to solve for a variable in a proportion?

Back

The first step is to cross multiply.

Front

Back

x = -24.

Front

Back

p = 308.