Proportions

Front

What is a proportion?

Back

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

Front

How do you find a missing value in a proportion?

Back

You can use cross-multiplication to find a missing value in a proportion.

Front

What is the ratio of 12 to 16 in simplest form?

Back

The simplest form of the ratio 12 to 16 is 3 to 4.

Front

If 14 sticks of pepperoni make 28 pizzas, how many sticks are needed for 36 pizzas?

Back

18 sticks.

Front

What is the formula to find the equivalent ratio?

Back

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

Front

If a baseball player makes 4 hits in every 7 times at bat, how many hits would he make in 42 at bats?

Back

He would make 24 hits.

Front

What is the ratio of total students to boys in a class with 12 girls and 16 boys?

Back

The ratio is 7 to 4.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100.

Front

If 13 out of 20 homes have a personal computer, how many computers would you expect in 60 homes?

Back

You would expect 39 computers.

Front

What does it mean for fractions to be equivalent?

Back

Fractions are equivalent if they represent the same value or proportion.