Unit 7 Review (Ratios, Rates, Proportions, and Percents)

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, expressed as a fraction or with a colon (e.g., 4:3).

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What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as one unit. For example, if a skydiver falls 144 feet in 3 seconds, the unit rate is 48 feet per second.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with 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. For example, if 1/2 = 2/4, then these two ratios are in proportion.

Front

How do you find the best deal when comparing prices?

Back

To find the best deal, compare the unit prices of the items. The item with the lower unit price is the better deal.

Front

What is a percent?

Back

A percent is a ratio that compares a number to 100. It is often used to express how much of something there is out of a total.

Front

If there are 4 red apples and 3 green apples, what is the ratio of red apples to green apples?

Back

The ratio of red apples to green apples is 4 to 3.

Front

If a car travels 300 miles in 5 hours, what is the unit rate in miles per hour?

Back

The unit rate is 60 miles per hour.

Front

What is the formula to calculate a percent?

Back

The formula to calculate a percent is (part/whole) x 100.

Front

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

Back

The ratio of flour to sugar is 2 to 3.