Math Proportionality and Cost Quiz

What is the fraction for 37.5%?

• 37/50

• 3/8

• 3/4

• 5/8

Determine if the following are proportional or not. Show your work. 4/5 and 10/30

• yes

• no

Determine if the following are proportional or not. Show your work. 3.2/4.2 and 16/16.8

• yes

• no

Which of the following would decrease the total cost? (select all)

• Gratuity

• Coupon

• Discount

• Tax

Mr. Jones runs a jewelry store. He buys an emerald ring from an antique shop for $450. If he marks-up the price of the ring by 60%, what is the price he will sell it for?

• $720.00

• $270.00

• $180.00

• $380.00

Henry measured the length of the wall to be 12 ft. The actual length of the pen is 13 ft. Which of these is closest to the percent error for Diego’s measurement?

• 108.3%

• 8.3%

• 7.7%

• 94.3%

Sarah’s dog weighs 22lbs. Mindy’s dog weighs 25% more. How much does Mindy’s dog weigh?

• 16.5 lbs

• 27.5 lbs

• 32.5 lbs

• 37.2 lbs

Melinda and Issac go out to eat for breakfast. Part A: If their food and beverages cost $20.00 and there is a 7% meals tax, how much is the bill? Write your answer to the nearest cent.

• $1.40

• $18.60

• $21.40

• $24.40

Melinda and Issac go out to eat for breakfast. Part B: After adding a tip, the total breakfast cost was $25.68. What percentage tip did they give? (hint: use the total from part A and use your percent change strategy) Write your answer to the nearest percentage.

Serena opened a savings account with a deposit of $650. She earns 1.5% interest per year on the account. What will be the total amount of money, in dollars, in Serena's account after 1 year if there are no other deposits or withdrawals?

• $659.75
• $9.75

• $640.25

• $734.80