The percent Equation
finding the percent of change
discount
mark up
Interest
100
What percent of 33.5 is 21?
62.7%
100
From 75 to 45
40% decrease
100
The price of a t-shirt is 50$. If you buy 4 shirts, you will get 10% discount. How much do you have to pay if you buy 8 shirts?
$360
100
Cost of a comic book: $3.95 Markup: 20%
$4.74
100
How much interest is earned on $269 at 10% for five years?
$134.50
200
What percent of 29 is 3?
10.3%
200
From 8 to 4
50% decrease
200
You have only 1,000$. The price of a TV-set is 1,150$. Can you buy the TV if you get 10% discount? yes or no?
No
200
Cost of a CD: $14.50 Markup: 30%
$18.85
200
You put $939 into an investment at 8% for six years. What will the balance be at the end of six years?
$1,389.72
300
What percent of 55 is 34?
61.8%
300
From 71 to 22
69% decrease
300
Peter has 100$. The price of a watch is 60$. If Peter gets 25% discount, can he buy 2 watches? yes or no?
yes
300
Cost of an oil change: $18.00 Markup: 70%
$30.60
300
What was the interest rate if your balance on an investment of $857 at the end of six years is $1,268.36?
8%
400
41% of 78 is what?
32
400
From 141 grams to 142 grams
0.7% increase
400
The price of an apple is 1.25$. If you get 20% discount, how much do you have to pay?
$1
400
Cost of an MP3 player: $129.50 Markup: 60%
$207.20
400
How much interest does a $775 investment earn at 7% over eight years?
$434
500
90% of 54.4 hours is what?
49 hours
500
From 79 ft to 157 ft
98.7% increase
500
The price of a math book is 50$, but you have only 35$ with you. If you get a discount of 20%, how much money do you need to borrow from a friend so that you can buy the book?
$5
500
Cost of an oil change: $21.95 Markup: 65%
$36.22
500
How long must $542 be invested at a rate of 7% to earn $303.52 in interest?
eight years
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