Unit 5: Percents, fractions, and decimals

An electronics store orders sets of walkie-talkies for $14.85 each. The store sells each set for $19.90. What is the percent markup?

34%

A bike store pays $29.62 for a helmet. The store sells the helmet for $39.99. Find the percent of markup.

35%

write a proportion and solve: what percent of 1920 is 12

x=0.625%

write a proportion and solve: what percent of 82 is 10.25

x=12.5%

write a proportion and solve: 99 is 72% of what number

x=13.75

write a proportion and solve: 108% of 47 is what number

x=50.76

simple interest formula

y=prt

Peter bought a model rocket kit from a catalog. The price of the kit was $119.99. The state sales tax of 8% was added, then a $15 charge for shipping was added after the sales tax. What was the total amount Peter paid, including tax and shipping cost?

$144.59

A bank account earns 5% simple interest per year. If the account was opened with $1,500, how much interest will it earn in 3 years?

$225

You borrow $300 for 5 years at an annual interest rate of 4%. What is the simple interest rate you pay in dollars?

$60

Maria bought a cabinent that was 25% off the regular price of $1088. If an 8% sales tax was added to the cost of the cabinent, what was the total price that Maria paid for it?

$881.28

write each percent as a decimal and a fraction: 0.39%

.0039 and ³⁹/₁₀₀₀₀

write each percent as a decimal and a fraction: 5%

.05 and ¹/₂₀

write as a percent: 0.0045

.45%

write each percent as a decimal and a fraction: 75%

.75 and ³/₄

write each percent as a decimal and a fraction: 125%

1.25 and ⁵/₄

write as a percent: ⁶/₅

120%

South Carolina has 6 seats in the US House of Reps in the 2000s. After the 2010 census, South Carolina has 7 seats. Find the percent increase.

16.6% repeated

Find the percent of change. Round to the nearest tenth. State whether it is an increase or decrease : 379 to 302

20.3% decrease

A store employs 57 part-time workers. This is 20% of their employee count. What is their total employee count

285

write as a percent: 0.03

3%

During a clearance sale, a keyboard that normally sells for $49.99 is discounted for $34.99. What is the percent discount?

30%

write as a percent: 0.3

30%

write as a percent: 5.187

518.7%

Sally bought a shirt at the sale price of $20. The original cost of the shirt was $50. What was the discount that Sally received when buying the shirt?

60%

write as a percent: ⁷/₈

62.5%

write as a percent: 0.759

75.9%

Find the percent of change. Round to the nearest tenth. State whether it is an increase or decrease : 4.15 to 4.55

9.6% increase

write as a percent: 9.283

928.3%

change over original OR original over change

change over original