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

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 rate?

Back

A rate is a specific kind of ratio that compares two 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.

Front

How do you find a unit rate?

Back

To find a unit rate, divide the quantity by the number of units to express the rate per one unit.

Front

What is a percent?

Back

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

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is the formula to find the percent of a number?

Back

The formula is: (part/whole) x 100 = percent.

Front

If 42 is 75% of a number, how do you find that number?

Back

To find the number, divide 42 by 0.75 (or 75%). The answer is 56.

Front

What is the relationship between ratios and proportions?

Back

Ratios can be used to form proportions, which are equations that show two ratios are equal.

Front

Which of the following is NOT equivalent to 3:5? 15:25, 9:15, 21:28, 30:50

Back

21:28 is NOT equivalent to 3:5.