Percent Proportions
60 is 80% of what number?
75
What is 65.5% of 400?
262
Best Buy is having a 20% off sale. What is the sale price of an iPad that usually costs $500?
$400
What is the equation for % of change? Either % increase or % decrease.
difference (-) / original x 100
What is the simple Interest equation?
DOUBLE OR NOTHING CHALLENGE:
What is the % error equation?
I-Prt
% error= |measured - actual|/|actual| X 100
What number is 5% of 250?
12.5
Brianna bought a new bag for $199 plus 8% sales tax. What is the cost of the sales tax?
$15.92
Walmart pays $250 for a TV. The store uses a 30% markup. What is the selling cost of the TV?
$325
During a sale, a sweatshirt is marked down from a selling price of $60 to a sale price of $57. What is the percent discount?
5%
Larry invests $100 in a savings plan. The plan pays 5.6% interest each year. How much money will Larry earn in interest after 5 years?
$28
Jack received an 80% on his math quiz. There were 50 total points. How many points did he receive?
40
Twenty percent of 30 students did their homework. How many students completed the homework?
6 students
A necklace costs $300. Alexis has a 20% off coupon. How much will the necklace cost Alexis after she applies the coupon?
$240
An electronic store buys speakers for $15.00 each. They sell each speaker to customers for $40.00 each. What is the % markup?
166.7%
A $1,000 savings bond earns simple interest at a rate of 3% per year. The interest is paid at the end of each month. How much interest will the bond be in 3 months?
$7.50
In a bag of M & M's, 13 are blue. This represents 40% of the package. How many M&Ms are in the bag in total?
32.5
Chris is a real estate agent. He receives a 6% commission on the sale of the house. How much is his commission on the sale of a $334,000 house?
$20,040
Shania went shopping to buy a new soccer ball. All items in the store were 40% of their original price. The original price of the soccer ball was $26.99. Find the discount of the ball and how much she paid for the ball.
$10.80 discount
$16.19 final price
Last month, 102 Chromebooks were borrowed from the library. This month, 52 Chromebooks were borrowed. Find the percent of change in the number of books borrowed.
49%
A student estimated a mass to be 780g, but upon carefully measuring it, found the actual mass to be 775g. What is the percent error?
0.65%
At the middle school, 35% of the students play an instrument. There are 700 students. How many students do NOT play an instrument?
455
A family goes out to dinner. Their bill costs $106.30 without tip or tax. There is a sales tax of 8.4% on the food. They also wish to add a 20% tip to the bill without tax included. What is the total cost of the bill with tax and tip?
$136.49
A scooter that is regularly $110 is on sale for 45% off its original price. Then, a 7.5% sales tax is applied. What is the total cost of the scooter?
$65.04
Jeans at Marshals were originally $32.99. They are on sale for $23.09. What percent is the discount?
30%
A student measured an 18-inch screen and found the measurement to be 18.67 inches. What is the % error?
3.7%