Original Cost
A book was sold for $21.60 after a 10% discount was applied. What was the original price of the book?
$24
State what each variable in the formula represents:
I = PRT
P - Principal
R- Rate
T-time
Last year on April 15th, the temperature was 60 degrees. This year, the temperature on April 15th was 75 degrees. What is the percent increase in temperature to the nearest whole percent?
25%
Solve the equation:
8(z−5)=−32
z = 1
A bag contains 3 red, 4 blue, and 5 green marbles. If one marble is selected at random, what is the probability that it is blue?
1/3
Jenny paid $90 for a graphing calculator. This included a 7% sales tax. What was the original cost of the calculator before the tax was added on?
$100
Sarah invests $4,500 in the bank. How long will it take her to earn $945 in simple interest if the annual rate is 4%?
5.25 years
Last year, 95 students participated in the school science fair. This year, 80 students participated in the science fair. What is the percent decrease in the number of students participating in the science fair? Round your answer to the nearest tenth of a percent.
15.8%
Rewrite in simplest terms: (−10x−7y)−(−5x+6y)
-5x - 13y
Emily tosses a fair number cube with sides labeled 1 through 6. What is the probability that she will toss a number that is greater than 2? Express your answer as a fraction.
2/3 or 4/6
A jacket was sold for $84.00 after a discount of 25% off was applied to its original price. What was the original price of the jacket?
$112
If John paid $2,400 in simple interest on a 5-year loan of $6,000, what was the interest rate?
8%
Mark estimates that it will take him 120 minutes to bike 15 miles. If he actually bikes that distance in 105 minutes, what is Mark’s percent of error? Round to the nearest hundredth.
14.29%
You spin two spinners. One spinner has the letters A, B and C. The other spinner has numbers 1 - 4. If you were to create a table showing the sample space listing all the possible combinations of spinning both spinners, which choice below would not be in your table?
A) 1 - A
B) 2 - B
C) 3 - C
D) 4 - D
D) 4 - D
A bag contains 6 yellow, 9 purple, and 5 orange marbles. A marble is selected at random. What is the probability the marble is not orange? Express your answer as a percent.
75%
A pair of headphones was sold for $85.50 after a 5% sales tax was added. What was the original price of the headphones before the tax?
$81.43
Emily deposited $3,000 in a new account that earns 5% simple interest. After three years, how much interest will she have earned?
$450
A custom estimates a computer at an electronics store is $1099. Determine the percent of error in price if the actual price is $1349. Round to the nearest whole percent.
19%.
Elvia can get a $10.28 discount on a $68.53 purchase at a certain department store because she works there. What percent discount does she get?
15% discount.
A spinner is divided into 8 equal sections numbered 1 through 8. What is the probability of spinning a number that is a multiple of 3?
25%
CHALLENGE! Multiple Percents Question
This weekend at Fitness Gear, rowing machines are discounted by 18% off the original price. On Saturday, shoppers who arrive by noon receive an additional 7.5% discount on the discounted price. What is the final cost of a rowing machine with an original price of $849.25, if both discounts are applied?
$644.66
Michael received $525 in interest on a 4.5-year investment of $2,500. What was the annual interest rate?
4.67%
A company predicted that its revenue for the year would be $1,200,000. The actual revenue was $1,050,000. What is the percent decrease in the company's revenue? Round your answer to the nearest tenth of a percent.
12.5%
If a stereo is sold for $59.99, and Karen pays $64.19 for it when she checks out, what is the sales tax in the area?
7% tax.
A box contains 16 red, 18 blue, 17 pink and 30 yellow balls. What is the probability of not drawing a pink or red? Express your answer as a percent rounded to the nest percent.
59%