Unit 4 Proportions Review

Quincy wanted to buy a TV. The TV was priced at $550.00 when he first went shopping. Then, the TV price was reduced by 20%. What is the new price of the TV?

• $110.00

• $440.00

• $530.00

• $660.00

The Smith's want to buy a new living room set of furniture. The regular price of the furniture is $1,250.00. The store is offering a 15% discount and a sales tax of 5%. What is the total cost of the furniture?

• $187.50

• $1,062.50

• $53.13

• $1,115.63

Jane is going shopping for new cycling equipment at Academy Sports. The helmet she wants costs $75.00. Academy Sports is offering a 15% off coupon OR a $15.00 off coupon. Which coupon should Jane use to save more money and why?

• 15% coupon because she will save $11.25

• $15.00 off coupon because she will save $15.00

• 15% off coupon because she will save $15.00

• $15.00 off coupon because she will save $11.25

Carmen wanted to leave a 15% tip. She thought that she could estimate the tip by using the 10% shortcut because 15% = 10% + 5%. Which of the following equations will help Carmen estimate the tip on a $56 bill?

• $5.60 + $2.80 = $8.40

• $5.60 + $5.60 = $11.20

• $5.60 + $0.56 = $6.16

• $2.80 + $2.80 = $5.60

A builder is using the scale drawing shown to build a pool. If the owner decides to increase the pool dimensions by 10%, what are the new dimensions of the pool?

• 11 ft x 16.5 ft

• 1 ft x 1.5 ft

• 9 ft x 13.5 ft

• 10 ft x 15 ft

Consider the equation:

x - 0.20x = 0.80x

Which of the following statements matches the mathematical equation?

• Decrease a number by 0.20 is the same as multiplying by 0.80.

• Decrease a number by 20% is the same as multiplying by 80%.

• Decrease a number by 20% is the same as increasing it by 80%.

• Decrease a number by 20 is the same as multiplying by 80.

Jeremy was shoe shopping with his mom. She was reviewing with him for his Unit 4 test. She asked him "The store discounts the $100.00 shoes by 20%. If you take the new price of the shoes and increase it by 20%, will you get the original price of $100.00?"

• Yes, because a decrease of 20% would equal an increase of 20%.

• No, because you would be using a different amount as your whole.

• Yes, because the 20% would be the same.

• No, because you would not need to increase.

Betty earns 8% commission on her total sales. Her sales totaled $900 last week. How much did Betty earn in commission?

• $72.00

• $828.00

• $972.00

• $8.00

Ricky needs $52 to pay for a bowling outing this weekend. If Ricky earns 8% in commission, what much his total sales be?

• $650.00

• $10.80

• $108.00

• $6,500.00

If Cynthia earns a 10% commission, which of the following proporions/equations would help her solve for her commission, c, for any given sale, s?