Review: Rates, Ratios, and Percents Unit Test

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 calculate a unit rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if you travel 150 miles in 3 hours, the unit rate is 150 miles ÷ 3 hours = 50 miles per hour.

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you find the percent of decrease?

Back

To find the percent of decrease, subtract the new value from the original value, divide by the original value, and multiply by 100. Formula: ((Original - New) / Original) x 100.

Front

What is the formula for percent of change?

Back

Percent of change = ((New Value - Original Value) / Original Value) x 100.

Front

If a shirt costs $36 and is on sale for $24, what is the amount of decrease?

Back

The amount of decrease is $36 - $24 = $12.

Front

How many tablespoons are in a cup?

Back

There are 16 tablespoons in 1 cup.

Front

Convert 16 cups of water to quarts.

Back

16 cups = 4 quarts (since 1 quart = 4 cups).

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Front

How do you express a ratio of 2 to 5 in fraction form?

Back

The ratio of 2 to 5 can be expressed as the fraction 2/5.