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Be a Pro at Proportions
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Ups and Downs
Simply Interesting
100
Write the fraction as a percent.
7/20
35%
100
Using the percent proportion.
56 bananas is what percent of 80 bananas?
70%
100
Use percent equation.
Find 37.5% of 5280.
1980
100
Find the percent of change.
55 mph to 70 mph
27.3% increase
100
Cost to store: $65
Markup: 25%
What is the selling price?
$81.25
100
Find the interest earned.
$500 at 4% for 3 years
$60 interest earned
200
Write the decimal as a percent.
0.038
3.8%
200
Using the percent proportion.
What is 40% of 360?
144
200
Use percent equation.
150 volts is what percent of 120 volts.
125%
200
Find the percent of change.
18.7 kg to 4.5 kg
-75.9% decrease
200
Original price: $75
Percent of discount: 30%
What is the sale price?
$52.50
200
Find the annual interest rate.
I=$200, P=$1000, t=4 years
5% annual interest rate
300
Write the percent as a decimal.
6.6%
0.066
300
Use the percent proportion.
36 jelly donuts is 200% of how many jelly donuts?
18 donuts
300
Use percent equation.
Your friend paid $248 for a ticket to a football game. This amount was 64% of the total amount your friend spent at the game. How much money did your friend spend?
$387.50
300
During a sale, the price of a pair of running shoes was marked down from $89.95 to $75.00. What was the percent discount?
- 16.6% discount
300
Dr. Sox paid $1580 for a new computer system. She also paid a 6.5% sales tax.
How much was the tax?
What was the total cost?
Tax is $102.70
Total cost is $1682.70
300
Ms. Zing deposited $850 in a savings account that paid 4.25% simple interest. What was the balance in her account at the end of 2 years?
Her balance is $922.25
Her interest is $72.25
400
Order the numbers from least to greatest.
5/6 , 0.7, 3/20, 1/8, 0.32
1/8, 3/20, 0.32, 0.7, 5/6
400
Use a percent proportion.
An orchestra has 60 musicians and 12 play woodwind instruments. What percent play an instrument that in not a woodwind?
80% do not play woodwind
400
A pair of sunglasses is on sale for $26. The original price of the sunglasses was $40. What percent of the original price is the sale price?
65%
400
Mr. Buckle bought 100 shares of Abacus Corp. stock at $36.75 per share and sold them at $34.50 per share. What was his percent loss?
- 6.1% loss
400
Jim bought a new bicycle for $129. If the sales tax is 8%, how much did Jim pay in sales tax? What was the total cost?
Sales tax: $10.32
Total cost: $139.32
400
Rolex borrowed $3200 from his credit union for 4 years. He was charged 9.8% simple interest. What was the total amount he owed the credit union? How much was the interest?
He owed a total amount of $4454.40.
The interest was $1254.40
500
Order the numbers from greatest to least.
8/9, 0.884, 22/25, 0.89
0.89, 8/9, 0.884, 22/25
500
Use the percent proportion.
Of the 427 people responding to a public opinion poll, 224 answered yes to a certain question and 154 answered no. What percent of those responding were undecided? Give your answer to the nearest tenth of a percent.
11.5% undecided
500
Of the 60 students in the seventh grade, 70% own a pet. How many of the seventh grade students do not own a pet?
18 students do not own a pet
500
- 60.9% decrease
500
Leo purchased items that cost $41.20, $13.90, $5.50, and $26.30. If his items total more than $80, the store will give him a 50% discount. Does Leo qualify for the discount? If so, what is his cost?
Yes, he does qualify for the discount.
His total cost is $43.45.
500
Mai invested $7000 in a money-market fund that paid 6.2% simple interest. What was the value of her account at the end of 18 months? How much interest was earned?
Her account balance was $7651.
She earned $651 in interest.