Percents Unit Review

Marie purchased a $49.00 gift for a baby shower. She uses a coupon that offers 20% off. How much will Marie spend on the gift after the coupon?

A recipe for apple cider calls for 4 cups of apple juice and 3 cups of water. Which equation can be used to find x, the percent of apple juice in the recipe?

Romeo paid $380.75 in car repairs. The sales tax rate is 7.5%. Which of the following is a reasonable estimate for the total Romeo paid to repair his car? Work it out like this: 380.75 x .075. After you get the answer add it to 380.75 and pick the closest estimate.

• $28.50

• $410.00

• $352.50

• $442.00

A local flower shop sells a dozen roses for $12.85. Based on this information, which of the following could be true?

• $38.55 for four dozen roses

• $64.25 for five dozen roses

• $30.70 for three dozen roses

• $32.13 for two dozen roses

Taylor plans to borrow $4,500 from the bank to purchase a used vehicle. If he borrows the money at a rate of 4% simple interest for 2 years, what is the total amount he will have to pay back to the bank?

• An increase of 28%

• An increase of 39%

• A decrease of 28%

• A decrease of 39%

Which set of ratios below is NOT equivalent to 3:4?

• 6 to 9, 9 to 12

• 9 to 12, 15 to 20

• 15:20, 24:32

• 30:40, 18:24

Sophia invests $12,500 in an account that earns 4% annual simple interest. Assuming she makes no additional deposits or withdrawals, how much interest will Sophia earn after 3 years?

• $1,250

• $1,500

• $2,500

• $14,000

A propeller rotates 6 times every 15 seconds.  Based on this information, which of the following could NOT be true?

• A.The propeller rotates 30 times in 90 seconds.

• The propeller rotates 24 times in one minute

• A.The propeller rotates 18 times in 45 seconds.

• A.The propeller rotates 12 times in 30 seconds.