Percent Increase and Decrease
Once I know a change, what gets divided by what to figure out the %?
change/original
What is the proportion used to find the sales/hotel tax?
tax/cost = %/100
What is the proportion to determine the amount of tip on a bill?
tip/cost = %/100
After I find a discount what do I do with it?
Subtract it from the original price
Find the percent increase:
10 inches to 15 inches
50%
$2.25
You go out to dinner and your bill cost $35 and you want to leave a 20% tip. What is the amount of tip?
$7
A pair of jeans usually costs $55 and is on sale for 20% off. What is the selling price of the jeans?
$44
Find the percent decrease:
12 inches to 24 inches
100%
A computer sells for $536 and has a sales tax of 7.5%. What is the total amount of the computer?
$576.20
You get your hair done at the beauty shop and if costs you $145. You want to leave a 15% tip. How much will your total bill be?
$166.75
You find a shirt that you like on the sale rack .It is marked 15%. The original price is $20. You also have a coupon for 25% off your entire purchase. What is the final cost after both discounts?
$12.75
You started the year with 20 7th graders and now there are 16 7th graders. What is the percent decrease?
20%
You stay in a hotel for 3 nights and pay $450. The hotel tax is 12%. What is the amount of tax?
The wholesale cost of a pair of tennis shoes is $64. The store markup percentage is 25%. What is the selling price of the tennis shoes?
$80
What is the first step when trying to find the original price of an item when given the sale price and the discount percent?
Subtract the discount percent from 100
The county sold 150 tickets for the spring concert in 2021. In 2022, they sold 223 tickets. What is the percent increase? Round to the nearest tenth if necessary.
49%
You stay in a hotel for 2 nights and pay $160. The hotel tax is 10%. What is the total amount you would pay for those two nights?
$176
A computer store uses a markup of 65%. The store paid a wholesale cost of $22 for a pair of earrings. What is the selling price of the earrings?
$36.60
The sale price of an item is $120. If the discount was 30% off the original price, what is the original price of the item?
$171.43