Ratio and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you express a ratio as a fraction?

Back

To express a ratio as a fraction, write the first quantity as the numerator and the second quantity as the denominator.

Front

What is the simplest form of the ratio 18 ounces to 3 cups?

Back

6 to 1.

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

Cross-multiply the terms and then solve for x.

Front

What is the missing value in the proportion 5/6 = x/12?

Back

x = 10.

Front

Which of the following ratios is proportional to 5/6? 1) 6/5 2) 50/75 3) 25/30 4) 12/10

Back

25/30.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities.

Front

If 3/4 = x/16, what is the value of x?

Back

x = 12.

Front

What is the formula for finding a missing term in a proportion?

Back

If a/b = c/d, then ad = bc.