Unit Rates/Percents

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as a quantity of one. For example, if a car travels 300 miles in 5 hours, the unit rate is 60 miles per hour.

Front

How do you calculate a percentage?

Back

To calculate a percentage, divide the part by the whole and then multiply by 100. For example, if there are 6 apples out of 15 pieces of fruit, the percentage of apples is (6/15) * 100 = 40%.

Front

What is the formula for finding the percent of a number?

Back

The formula is: Percent = (Part/Whole) * 100.

Front

If 75% of a number is 30, what is the number?

Back

To find the number, divide 30 by 0.75. The number is 40.

Front

What does it mean to find 125% of a number?

Back

Finding 125% of a number means to take the whole number and add an additional 25% of that number. For example, 125% of 8 is 8 + (0.25 * 8) = 10.

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. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is the cost per item if 3 items cost $12?

Back

To find the cost per item, divide the total cost by the number of items. $12 ÷ 3 = $4 per item.

Front

If a bathtub holds 80 gallons and is filled at a rate of 4 gallons per minute, how long will it take to fill half the tub?

Back

It will take 10 minutes to fill half the tub (40 gallons) since 40 gallons ÷ 4 gallons/minute = 10 minutes.

Front

What is 40% of 50?

Back

40% of 50 is calculated as (40/100) * 50 = 20.

Front

How do you find the total cost if the unit price is $5 and you buy 4 items?

Back

Multiply the unit price by the number of items: $5 * 4 = $20.