Percent, Unit Rate, Scale Factor, Commission, Interest

• I = prt• Interest = Principal x rate x time• Sold x rate = commission

of

is

100

%

100

Percent

Original

Change

Whole

Part

100

%

• 1. Which is a better buy?A. $3.99 for 25 ounces of detergentB. $6.99 for 90 ounce of detergent

• 2. 30% of 20 is what number?A. 6B. 0.6C. 0.06D. 0.006

• 3. Julianne went to a hair salon for a haircut. The cost of the haircut was $45. If she tipped the stylist 15% of the cost of the haircut, how much money did Julianne spend at the hair salon?

• 4. If the cost of an Algebra book was $120, but it is now $90, what is the percent of decrease? F. 25%G. 33.3%H. 40%J. 30%

• 5. Rachel currently spends 25 minutes exercising each day. If she increases her exercise time by 12%, how many minutes will she now spend exercising?A. 3 minB. 28 minC. 30 minD. 37 min

• 6. A pair of boots cost Lauren $60 last year. This year they cost $66. What is the percent of increase?F. 110%G. 10%H. 9%J. 5%

• 7. Fred earned $600 last month. According to the circle graph, how much money did he put in savings?A. $140B. $160C. $180D. $200

• 8. If a scale factor of 2.5 is applied to the rectangular prism, what is the surface area of the new figure?

6 cm

2 cm

4 cm

• 9. Mollie purchased a jacket from the Gap. The regular price was $90. It was on clearance for 50% off. If the sales tax rate was 6%, how much did she pay for the jacket?A. $45.00B. $45.06C. $47.70D. $143.10

• 10.

• 11. Mr. York deposited $160 in an account that pays 4 ½% interest each year. How much interest would he have after 2 years?A. $8.40B. $10.40C. $12.80D. $14.40

• 12. Jordan gets 15% commission working at Gallery Furniture. If she received $4500 in commission, how much furniture did she sell?A. $675B. $30,000C. $34,500D. $4515

• 13. Bailey found just the right pair of boots at the mall. They were regularly priced $110. They were on sale for 30% off. Sales tax rate was 7%. What was her total cost?F. $82.39G. $153.01H. $77.07J. $5.39

• 14. At Strack Intermediate, 42% of the students enrolled are 8th graders. If there are 378 students in the 8th grade, how many students are enrolled at Strack?F. 900G. 522H. 420J. 159