Review: Rates, Ratios, and Percents Unit Test

Front

What is a rate?

Back

A rate is a ratio that compares two different kinds of quantities, often expressed as a fraction or a percentage.

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

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, denoted by the symbol '%', indicating how many parts out of 100.

Front

How do you calculate 80% of a number?

Back

To calculate 80% of a number, multiply the number by 0.80 (or 80/100). For example, 80% of 70 is 70 * 0.80 = 56.

Front

If 40% of 350 flowers must be red roses, how do you find the number of red roses?

Back

To find the number of red roses, multiply 350 by 0.40 (or 40/100). So, 350 * 0.40 = 140 red roses.

Front

How do you calculate the percent decrease in price?

Back

To calculate percent decrease, subtract the new price from the original price, divide by the original price, and multiply by 100. For example, (36 - 24) / 36 * 100 = 33%.

Front

How do you convert meters to centimeters?

Back

To convert meters to centimeters, multiply the number of meters by 100, since 1 meter equals 100 centimeters.

Front

What is the formula for percent change?

Back

The formula for percent change is: ((New Value - Original Value) / Original Value) * 100.

Front

If a ticket price increases from $100 to $120, what is the percent change?

Back

The percent change is ((120 - 100) / 100) * 100 = 20%.

Front

What is the relationship between rates, ratios, and percents?

Back

Rates, ratios, and percents are all ways to compare quantities, with rates comparing different types of units, ratios comparing similar units, and percents expressing a part of a whole.