Percentages
What is 10% of 50?
5
A basketball costs $20. If the price increases by 10%, what is the new price?
$22
A store buys a book for $10 and marks it up by 20%. What is the selling price?
$12
John deposits $500 into a savings account that earns 4% simple interest per year. How much interest will he earn in 2 years?
$40
Sarah measured the length of a table to be 120 cm, but the actual length is 125 cm. What is the percent error in Sarah's measurement?
4%
What is 25% of 200?
50
A video game originally costs $60. It is now on sale for 25% off. What is the sale price?
$45
A jacket originally priced at $80 is marked down by 30%. What is the new price after the markdown?
$56
Maria borrows $1,200 from a friend with an agreement to pay back the loan in 3 years at a simple interest rate of 5%. How much total interest will Maria owe?
$180
A scientist predicted the temperature to be 35°C, but the actual temperature was 32°C. What is the percent error in the prediction?
9%
What is 60% of 120?
72
A laptop is priced at $900, but its price will increase by 8%. What will be the new price after the increase?
$972
A coffee shop buys a bag of coffee beans for $15 and marks it up by 50% for retail. What is the selling price?
$22.50
Emma invests $1,000 in an account that earns 6% interest annually. How much will be in the account after 3 years?
$1,180
A factory estimated it would produce 10,000 units of a product, but it actually produced 9,600 units. What is the percent error in the factory's estimate?
4%
What is 17% of 350?
59.5
The population of a town decreased by 12% over a year. If the initial population was 25,000, what is the population at the end of the year?
22,000 people
A bicycle originally priced at $350 is first marked down by 15%, and later marked down again by 10%. What is the final price after both markdowns?
$267.75
A company invests $5,000 in an account that earns 4% interest annually. What will the investment be worth after 5 years?
$6,000
A chef weighed a bag of flour and recorded it as 2.5 kg, but the actual weight of the bag was 2.8 kg. What is the percent error in the chef's measurement?
11%
What is 2.5% of 1,600?
40
A store raised the price of a jacket by 15%, and later applied a discount of 20% on the new price. If the original price was $100, what is the final price after both changes?
$92
A store buys a phone for $500 and marks it up by 40%. After a month, the store marks it down by 25% due to low sales. What is the final selling price?
$525
A bank gives a loan of $2,500 at a simple interest rate of 8% per year for 4 years. How much total amount, including both the principal and interest, will the borrower have to pay at the end of the loan term?
$3,300
During an experiment, a student calculated the density of a liquid to be 1.25 g/mL, but the true density is known to be 1.18 g/mL. What is the percent error in the student's calculation?
6%