Ratios, Unit Rates, 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

How do you find a unit rate?

Back

To find a unit rate, divide the quantity by the number of units. For example, if you have 624 calories in 3 servings, the unit rate is 624 ÷ 3 = 208 calories per serving.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

If you earn $15 every 3 weeks, how much do you earn in 5 weeks?

Back

$25

Front

What is the unit rate of 624 calories in 3 servings?

Back

208 calories per serving

Front

You travel 150 miles on 5 gallons. How far did you travel per gallon?

Back

30 miles per gallon

Front

If there are 88 students in 4 classes, how many students are there per class?

Back

22 students per class

Front

Solve the proportion: 4/8 = x/10. What is x?

Back

8

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities. For example, 1/2 and 2/4 are equivalent ratios.

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. For example, the ratio of 3 to 4 can be written as 3/4.