Ratios and Unit Rates

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 the unit rate?

Back

To find the unit rate, divide the total quantity by the number of units. For example, if 12 items cost $3.00, the unit rate is $3.00 ÷ 12 = $0.25 per item.

Front

What is the ratio of 3 blue marbles to 5 yellow marbles?

Back

The ratio of blue to yellow marbles is 3:5.

Front

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

Back

22 students per class.

Front

Which is a better buy: a 12 pack of Coke for $3.50 or a 6 pack for $1.80?

Back

The 12 pack of Coke is a better buy.

Front

What does the ratio 2/3 represent?

Back

The ratio 2/3 represents a comparison of two parts to a whole, indicating that for every 2 parts of one quantity, there are 3 parts of another.

Front

If a box of 35 diapers costs $6.99, what is the cost per diaper?

Back

The cost per diaper is $0.20.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is 1. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How can you express the ratio of 2 red marbles to 5 yellow marbles?

Back

The ratio can be expressed as 2:5.

Front

What is the first step in solving a ratio problem?

Back

The first step is to identify the two quantities being compared.