Ratios & Rates
The ratio of red marbles to blue marbles is 2:3. If there are 12 blue marbles, how many red marbles are there?
8
What is 20% of 50?
10
A $50 shirt has a 10% discount. What is the sale price?
$45
If 5 pencils cost $2, how much will 15 pencils cost?
$6
The price of a tablet increased from $200 to $260. What is the percent increase?
30%
A car travels 180 miles in 3 hours. What is the unit rate in miles per hour?
60 mph
25 is what percent of 100?
25%
A pair of shoes costs $80 with 7% sales tax. What is the total price?
$85.60
A map uses a scale of 1 inch = 10 miles. How many miles are shown by 6 inches?
60 miles
The store sold 60 out of 75 backpacks. What percent were sold?
80%
The ratio of teachers to students is 1:25. If there are 200 students, how many teachers are there?
8 teachers
A shirt originally costs $40 and is on sale for $30. What is the percent decrease?
25% decrease
A jacket costs $120. It’s on sale for 25% off. What is the discounted price?
$90
A recipe for 8 cookies needs 2 cups of flour. How much flour is needed for 20 cookies?
5 cups of flour
A doctor earns $4,800 per month and pays 15% in taxes. What is her net pay?
$4,080
A model train uses a scale where 1 inch represents 5 feet. If the actual train is 100 feet long, how long is the model?
20 inches
A student answered 27 out of 30 questions correctly. What percent did they get correct?
90%
A laptop costs $900 with a 15% discount and then 8% tax. What is the total price? (Round to the nearest cent.)
$826.20
A 6-foot person casts a 9-foot shadow. How tall is a tree that casts a 15-foot shadow at the same time?
10 feet
A family spends 30% of their $3,000 income on rent and 20% on food. How much remains?
$1,500
A recipe calls for 2 cups of sugar for every 3 cups of flour. How many cups of sugar are needed for 9 cups of flour?
6 cups
A population grows from 120 to 150 people. Find the percent increase.
25% increase
A phone costs $670. It’s marked down 20%, then a 7% tax is added. What is the final cost?
$574.56
3 notebooks cost $7.50. How many notebooks can you buy with $25?
10 notebooks
A runner’s time improved from 50 minutes to 42 minutes. What percent decrease is that?
16% decrease