Proportions

Front

What is a proportion?

Back

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

Front

How do you solve for x in a proportion?

Back

To solve for x in a proportion, cross-multiply the two ratios and then isolate x.

Front

If 5 ice cream cones are sold for every 3 brownies, what is the ratio of ice cream cones to brownies?

Back

The ratio of ice cream cones to brownies is 5:3.

Front

What is 25% of 28?

Back

25% of 28 is 7.

Front

If there are 24 brownies sold, how many ice cream cones are sold if the ratio is 5:3?

Back

If there are 24 brownies sold, then 40 ice cream cones are sold.

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 express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity.

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If x/10 = 2/5, what is x?

Back

x = 4.

Front

What is the first step in solving a proportion?

Back

The first step is to set the two ratios equal to each other.