Review- Ratios, Rates and Proportions

Front

What is a ratio?

Back

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

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

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 two ratios and then solve for x.

Front

If 2 eggs make 10 pancakes, how many eggs are needed for 40 pancakes?

Back

8 eggs

Front

If Kyle eats 1/2 of a pie in 1/5 of a minute, how many pies can he eat in one minute?

Back

2 and 1/2 pies per minute

Front

If Jada reads 3/5 of a book in 1/4 of an hour, how long will it take her to read one whole book?

Back

2 and 2/5 hours per book

Front

What is the unit rate?

Back

The unit rate is a rate in which the second quantity is 1, such as 60 miles per hour.

Front

How do you convert a ratio to a fraction?

Back

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

Front

What is the relationship between ratios and proportions?

Back

Ratios can be used to form proportions, which are equations that show two ratios are equal.