Ratios, Rates, Unit Rates, and Percents

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

How do you express the ratio of girls to boys if there are 8 boys and 12 girls?

Back

The ratio of girls to boys is 3 to 2.

Front

If Jack earns $46.80 for 6 hours of work, how do you calculate his rate of pay?

Back

To calculate the rate of pay, divide the total earnings by the number of hours worked: $46.80 / 6 hours = $7.80 per hour.

Front

What does the ratio 8 : 23 represent in a pet store with 8 dogs, 12 turtles, and 3 cats?

Back

The ratio 8 : 23 compares the number of dogs to the total number of animals (8 dogs + 12 turtles + 3 cats = 23 animals).

Front

How many students are on one bus if 125 students are riding in 5 buses?

Back

To find the number of students on one bus, divide the total number of students by the number of buses: 125 students / 5 buses = 25 students per bus.

Front

What is a Rate?

Back

A rate is a ratio that compares two different units, such as distance per time or cost per item.

Front

What is a Unit Rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as miles per hour or price per item.

Front

How do you convert a ratio to a percentage?

Back

To convert a ratio to a percentage, divide the first quantity by the total of both quantities and multiply by 100.

Front

What is the formula for calculating a percentage?

Back

The formula for calculating a percentage is: (part/whole) x 100.

Front

If a recipe requires 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2 to 3.