Unit Rates and Percents Review

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you calculate a percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (as a decimal). For example, to find 40% of 350, calculate 350 x 0.40 = 140.

Front

If 3 apples represent 50% of a bag, how do you find the total number of apples in the bag?

Back

To find the total, divide the number of apples (3) by the percent (0.50). So, 3 ÷ 0.50 = 6 apples.

Front

What is the formula to find the percent of correct answers on a test?

Back

The formula is: (Number of correct answers ÷ Total number of questions) x 100.

Front

If Kaitlyn got 17 questions correct out of 20, what percent did she get correct?

Back

(17 ÷ 20) x 100 = 85%.

Front

How do you find the cost per item when given the total cost and quantity?

Back

To find the cost per item, divide the total cost by the number of items. For example, $30 ÷ 6 tickets = $5 per ticket.

Front

What does it mean if a graph shows a linear relationship between two variables?

Back

A linear relationship means that as one variable increases, the other variable increases or decreases at a constant rate.

Front

If a florist needs 40% of 350 flowers to be red roses, how do you calculate the number of red roses?

Back

Calculate 40% of 350 by multiplying: 350 x 0.40 = 140 red roses.

Front

What is the relationship between unit rates and ratios?

Back

A unit rate is a specific type of ratio that compares a quantity to one unit of another quantity.

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.