# Lesson Worksheet: Applications of Percentage Mathematics • 7th Grade

In this worksheet, we will practice solving real-life problems involving sales tax and percentage discounts, with decimals and integers.

**Q4: **

Madison is buying a computer for $500. The sales tax is . If the store is having a sale of , determine the sale price of the computer before the tax, and then determine the amount of that tax.

- A$584.00, $35.04
- B$535.71, $32.16
- C$430.00, $25.80
- D$570.00, $34.20
- E$70.00, $4.20

**Q6: **

Benjamin bought a t-shirt for $8.60, a pair of pants for $9.85, and a pair of socks for $6.75. If there was a tax of on the total amount, which of the following mathematical operations could be used to find how much tax Benjamin paid for the new clothes?

- AMultiply the tax rate by the product of the prices of the clothes.
- BMultiply the tax rate by the price of the most expensive clothes.
- CMultiply the tax rate by the sum of the prices of the clothes.
- DAdd the prices of the clothes to the tax rate.
- EAdd the prices of the clothes.

**Q8: **

On a trip to New York, a tourist bought 5 souvenir mugs for $7.23 each. Given that the sales tax was , determine, to the nearest cent, the total amount he paid.

**Q9: **

If an electric shaver costs $282, not including the sales tax, use the information in the table to determine the total cost of an electric shaver, including tax, in Washington.

State | Washington | Kansas | North Carolina |
---|---|---|---|

Sales Tax Rate |

**Q10: **

A microwave oven costs $220, not including the sales tax, and a store in South Dakota has a microwave on sale for off. If the sales tax is calculated after the discount, what is the cost of the microwave?

State | Maine | North Virginia | South Dakota |
---|---|---|---|

Sales Tax Rate |

**Q12: **

Which of the following is the nearest amount to the sales tax David would pay for a TV that costs $478, given that the sales tax rate is ?

- A$48
- B$20
- C$58
- D$24
- E$12

**Q13: **

The cost of a carton of milk is 14 LE. The shop selling the milk offers a discount of if two or more cartons are purchased. How much do 10 cartons cost?

**Q14: **

A washing machine was sold for a discounted price of 1,380 LE. Given that the discount was , calculate the original price of the washing machine.

**Q15: **

Hannah is buying a computer for $630. If the sales tax is , determine the total cost of the computer.

**Q16: **

In a closing sale, a shop offered discount on all items. On the last day, a further discount was offered. What was the percentage discount of the original price after the second discount?

**Q17: **

Emma bought a new computer for $1,000. She paid a down payment and charged the difference. If the interest rate on her credit card is , how much will she owe after if she made no payments after the down payment?

**Q18: **

A man bought his friend dinner, and the bill came to plus tax. Find the total amount he paid if he left of the original amount as a tip.

**Q19: **

Determine, to the nearest cent, the cost of a home theater system that costs $420 with a sales tax of .

**Q20: **

Isabella’s is having a off storewide sale. You have a coupon for an additional discount. Which option will give you a lower price on a purchase?

Option A: The store clerk applies a discount of , since that’s the sum of and . Option B: The store clerk first applies the discount, and then applies the discount to that value.

- AOption A
- BBoth Option A and Option B yield the same price
- COption B

**Q23: **

Natalie is buying a computer for $850. The sales tax is . If the store is having a sale of , determine the sale price of the computer before the tax, and then determine the amount of that tax.

- A$1,021.00, $71.47
- B$897.22, $62.79
- C$697.00, $48.79
- D$1,003.00, $70.21
- E$153.00, $10.71

**Q24: **

A family spends of its monthly income on rent and on food and then saves the rest. How much can the family save if its monthly income is 600 LE?