Proportional Reasoning
24 out of 40
60%
72 out of 180
72=(p*180)÷100
p=40%
Find the percent of change:
25 basketballs to 35 basketballs
10=(p*25)÷100
p=40%
Find the total cost:
$115 tablet; 35% markup
$155.25
Find the simple interest after one year:
$650 at 5%
$32.50
Mrs. Ryder estimates that 18 people will attend an open house. A total of 30 people actually attend the open house. What is the percent error of Mrs. Ryder's estimate?
40%
98 out of 1960
20%
135 out of 250
135=(p*250)÷100
p=54%
Last year, a blue-ticket sponsorship was $50. This year a blue-ticket sponsorship is $85. What is the percent of increase for a blue-ticket sponsorship?
35=(p*50)÷100
p=70%
Marcus customizes snowboards at a cost of $149.75. Then he includes a markup of 42% when he sells them to the ski resort. How much does the ski resort pay for a snowboard?
$212.65
Emily opened a savings account with a $500 deposit. The account pays 1.25% simple interest each year. If she neither adds nor withdraws from the account, how much interest will she earn after a year?
Thomas estimates that he will earn $3,200 in commission this month. He actually earns $3,500. What is the percent error of Thomas's estimate?
8.6%
80% of 160
128
On a quiz, Amanda answered 57 of the 60 questions correctly. What percentage of the question did she answer incorrectly?
3=(p*60)÷100
p=5%
18=(p*32)÷100
p=56.25%
The wholesale cost of a cat carrier is $22.50. If the markup for the carrier is 33.3%, what price will the pet store put on the carrier?
$29.99
Mr. Pharm put $1,550 into a savings account. The account pays 3.5% simple interest on an annual basis. If he does not add or withdraw money from the account, how much money will be in the account after a year?
$1604.25
The attendance at the school musical on Friday night was predicted to be 570 people. The actual attendance was 625 people. What is the percent error?
8.8%
120% of 90
108
36% of 150
54%
Last month, Paulina earned $520.60. This month, she works overtime and earns $601.30. What is the percent of increase in Paulina's earnings?
80.7=(p*520.60)÷100
p=15.5%
Find the total cost of $60 shoes with a 15% discount.
$51
A local camping store deposited $12,000 into a savings account. The account earns $528 simple interest after one year. What was the annual interest rate?
4.4%
Raylin estimates that an antique toy car will sell for $70 at auction. The toy car actually sells for $52.50. What is the percent error of Raylin's estimate?
33.3%
Determine the amount of tax paid on the item to the nearest cent: $42 sweater, 5% tax
$2.10
Michelle and some friends went out to dinner. The cost of the meal was $68.50. They left a 20% tip. What was the total cost of the dinner, including tip?
$82.50
Last year, 780 students purchased school pictures. This year, 620 students purchased pictures. What is the percent of decrease in the number of pictures purchased?
160=(p*780)÷100
p=20.5%
At a signing event, an author sells her books for $15 each. If a fan buys 4 books, the author marks down the fourth book by 25%. How much does a fan pay for 4 books?
$56.25
The Kennedy Club borrows $1,100 from the bank for a new stove. It takes one year to repay the loan and they repay $1,171.50 in all. What was the simple interest rate?
6.5%
A coach tells swimmers that he wants them to swim 42 miles this month for practice. The coach will accept distances between 40 and 50 miles. What is the percent error for the allowable distances?
Lower: 4.8%
Upper: 19%