Percent equation
What is 10% of 15?
0.10 * 10 = 1.5
What is a 10% increase of 10?
10(1 + 0.10) = 11
What is the percent change from 15 to 20?
(20 - 15) / 15= 0.33 or 33%
A family at Olive Garden has a total bill of $84. If they leave a 20% tip, what is the total cost of the meal?
$100.80
What percent of 40 is 11?
11/40 = 0.275 or 27.5%
What is a 20% decrease of 17?
17(1-0.20) = 13.6
What is the percent change from 88 to 25?
(25 - 88) / 88 = -0.71 or -71%
In Medina County, the sales tax is 6.75%. At Target, you spend $30; what is the total cost of your purchase?
Multiple ways to answer
$32.03
6 / .45 = 13.333 ....
What is a 15% mark up on $27?
27(1+0.15) = $31.05
What is the percent change from 2.2 to 3?
(3 -2.2)/2.2 = 0.36 or 36%
At a store you use a 20% off coupon on a purchase of $69.99. Sales tax is 6.75%. What is the total cost of your purchase?
Multiple ways to answer
$59.77
27% of what number is 18.2?
18.2 / .27 = 67.40
What is a 20% tip on a $40 meal?
40(1+0.20) = $48
What is the percent change from 4.5 to 2.1?
(2.1 - 4.5) / 2.1 = -1.14 or -114%
You have an initial investment of $1000. The investment company charges a fee of 2% per year to manage your money. Your investment has a return of 8%. What is your investment worth after a year? (Hint, calculate the fee first then the return)
Multiple ways to solve
$1,058.40
19 is what percent of 11?
19/11 = 1.72 or 172%
What is a 4% inflation on one gallon of milk that costs $2.89
2.89(1+0.04) = $3.01
What is the percent change from 3 to 700?
(700 - 3) / 3 = 232.33 or 23,233%
At a job, you earn a 10% comission on your sales but also invest 10% of your money each month. In a month, you sold $20,000 worth of product. How much money do you have left over?
Assuming you sell that much each month, how much do you have left over per year?
Multiple ways to solve
$1800 per month left over
$21,600 per year left over