Percent Problems
What is 26 percent of 450?
117
In a class, the number of students has been increased from 24 to 30. What is the percentage increase?
25%
A chair originally costs $360. There is a 10% tax. How much does it cost to buy?
$396
interest = principal x rate x time
You invest $100 for 10 years with a 10% interest rate. How much interest do you earn?
$100
Express 0.347 as a percent.
34.7%
28 is what percent of 140?
20%
The price of gas rose from $4.00 to $4.50 per gallon in one month. By what percent did the gas price rise?
12.5%
A computer originally cost $700 but it is on sale for 20% off. What is the sale price?
$560
interest = principal x rate x time
If you save $250 at 4% interest for 3 years, how much interest do you earn?
$30
Express 1.2 as a percent.
120%
40 is 5 percent of what number?
800
Jason got a raise, and his hourly wage increased from $20 to $36. What is the percent increase?
80%!
The original price of a sofa was $660. However, it sustained some damage in the showroom. It is now selling for 45% off the original price. What is the discounted price?
$363
interest = principal x rate x time
If you invest $3,400 and receive a 6% annual return on your investment for 2 years, how much did you investment grow by?
$408
Express 45% as a fraction in simplest form.
9/20
32 is what percent of 800?
4%
A shirt was originally priced at $35. It went on sale for $25. What was the percent that the shirt was discounted? Round to the nearest percentage.
29%
A mattress' advertised price is "$840 plus tax." Tax is 15%. How much does the mattress actually cost?
$966
interest = principal x rate x time
You charge $3,200 on your credit card. If you hold the balance for 6 years at a 9% interest rate, how much interest do you end up paying?
$1,728
Express
1/200
as a percent.
0.5%
66 is 22 percent of what number?
300
Liam ordered a new washing machine for $440. Sales tax was 5%. He also wanted to tip the two delivery guys $20 each. How much more (as a percent increase) did Liam actually pay over the list price. Round to the nearest percent.
14%
A restaurant bill is $60. You want to leave a 15% tip. How much do you leave on the table?
$69
interest = principal x rate x time
If you save $4,300 for 6 months, and you receive an interest rate of 4% per year, how much do you earn in interest?
$86
Express
83 1/3%
as a fraction in simplest form.
5/6
48 is what percent of 800?
6%
Lee had been eyeing a pair of pants that cost $48. To cover increased costs, the store raised all of its prices by 20% before Lee had a chance to buy the pants. Fortunately, Lee had a coupon for 20% off. How much did Lee end up paying for the pants?
$46.08
A restaurant bill is $44. You want to leave a 20% tip, rounded to the nearest dollar (waiters hate getting change in their tips). How much do you leave on the table?
$53
What is the different between simple and compound interest? Which is preferable if you are making an investment? Which is preferable if you are accruing debt?
Simple interest only applies to the original balance. Compound interest applies to the entire (increasing) balance. In other words, interest is paid on the interest. Compound interest is much better if you are making an investment, like putting money into a savings account. Simple interest is best if you are taking on debt... but good luck finding it!
Express
15/7
as a percent. Round to the nearest tenth of a percent.
214.3%