Identify the Strategy
You know that 3 notebooks cost $6. You need to find the cost of 1 notebook. What strategy should you use?
Find the unit rate by dividing $6 by 3.
Find 10% of 80
8
A $30 game is 20% off. How much money is the discount?
$6
Four apples cost $3. What is the cost per apple?
$0.75 per apple
Complete the equivalent ratio: 2:3 = 8:?
12
A shirt costs $40 and is 25% off. What operation helps you find the amount of the discount?
Multiply 40 by 0.25 (or find 25% of 40).
What percent of 50 is 15?
30%
A $50 hoodie is 10% off. What is the sale price before tax?
$45
A 12-ounce box of cereal costs $3. What is the unit price per ounce?
$0.25 per ounce
Is 6:10 equivalent to 9:15 ?
Yes; both simplify to 3:5.
A recipe uses 2 cups of flour for 3 batches. You want to know how much flour is needed for 12 batches. What strategy could you use?
Set up a proportion, or multiply by 4 because 3 × 4 = 12
18 is 30% of what number?
60
A $72 pair of shoes is 25% off. What is the sale price before tax?
$54
A car travels 180 miles using 6 gallons of gas. What is the unit rate?
30 miles per gallon.
Complete the ratio table: 5 books cost $20. How much do 15 books cost at the same rate?
$60
Two routes are 18 miles in 30 minutes and 21 miles in 28 minutes. What should you compare to decide which route is faster?
Compare their unit rates, such as miles per minute or miles per hour.
A basketball player made 21 out of 30 free throws. What percent of the free throws did the player make?
70%
A backpack was $40 and is now $30. What percent discount was given?
25%
Which is the better buy: 8 bottles of water for $4.80 or 12 bottles for $6.60?
12 bottles for $6.60; it costs $0.55 per bottle, compared with $0.60 per bottle.
A paint mixture has 3 cups of blue paint for every 5 cups of white paint. How many cups of white paint are needed for 18 cups of blue paint?
30 cups
A table shows 4 tickets cost $30 and 10 tickets cost an unknown amount. What is the best strategy to find the missing cost?
Find the cost per ticket, then multiply by 10; or set up and solve a proportion.
A student answered 42 of 48 questions correctly. What percent did the student answer correctly?
87.5%.
Store A sells a $60 item for 30% off. Store B sells the same item for $18 off. Which store has the better deal?
They are the same: both discounts are $18, so the sale price is $42.
A runner completes 7.5 miles in 50 minutes. What is the runner's unit rate in miles per minute?
0.15 miles per minute.
The ratio of boys to girls is 4:7. If there are 44 students total, how many are girls?
28 girls