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Review Part 2 Worksheet
1. Convert Decimal to Percent:
a. 0.467
b. 0.82
46.7%
82%
2. Convert Percent to Decimal:
a.
b.
c.
d.
29.5%
81%
3%
90%
.295
.81
.03
.90
3. Convert Fraction to Decimal (don’t round):
a.
b.
23
40
5
8
.575
.625
4. Convert Fraction to Percent – two steps (don’t round):
a.
b.
7
50
7
8
.14 = 14%
.875 = 87.5%
Tips:
A restaurant bill is $84.97, find a
5. 15% tip
$84.97 X .15 = $12.75
6. 20% tip
$84.97 X .20 = $16.99
Tax:
You go grocery shopping and you spend $124.68
7. Find the tax on your purchase if the sales tax is 6.85%
$124.68 X .0685 = $8.54
8. How much is your total after the tax?
$124.68 + $8.54 = $133.22
Interest Rate
I = P x R x T:
9. Find the interest earned if P = 8000 R = 7% and T = 1 year
8000 X .07 X 1= $560 interest
10. Bill invests $450 dollars into a savings account that earns 3.2% every year. How much will he have
earned if he leaves it in the account for 5 years?
$450 X .032 X 5 = $72 in interest
11. Nancy’s credit card has $1850 on it. Her bank penalizes her 9.8% each year she has that balance. If she
leaves her credit card like that for 2 years how much will she have on her credit card?
$1850 X .098 X 2 = $362.60, $1850 + $362.60 = $2212.60 she now owes on her credit card.
Set up that proportion and solve!:
12. One serving of pasta contains 210 calories. What percent of a 2000-calorie diet is contained in one
serving of pasta
210
X
= 100
2000
10.5% of a 2000 calorie diet
13. The $299.99 cell phone Brittany purchased was on sale for 10% off. What amount did Brittany get off
the price?
x
10
= 100
299.99
$29.99 off the original price
A laptop computer is normally $1299 but it discounted to $999. What percent of the original price does
Charles pay?
999
X
= 100
1299
76.9% of original price
14. Jacob paid $120 for a portable e-book reader that was 80% of the original price. What was the original
price?
120
𝑋
80
= 100
$150 was the original price
Opposite questions:
15. Kim got 3 problems wrong on a test of 25 questions. What percent of the questions did she get
correct?
25-3 means kim got
22
x
= 100
25
88 % correct
16. Joey went golfing and out of 15 holes he shot 80% of them on par. How many holes were not on par?
(If you are wondering what par means, it is the pre-determined number of strokes a golfer should take to complete the hole….haha maybe you are even
more confused…or you already knew that! But you don’t need to know that information to complete this problem, just a bit of side information. Now get
solving!)
100% - 80% = 20% not on par
x
15
20
= 100
3 holes were not on par
Box problems + write that sentence!:
17. If you ate a 315-calorie meal, and 95 calories are from fat, about what percent of the meal is fat?
Use a Proportion
95
Fat
x
315
95 cal.
= 100
Answer
95 X 100
315
=X
x= 30.16%
Sentence: 30.2 % of the calories in a 315 calorie meal came from fat, if you ate 95 calories (from fat).
18. You want to leave a tip for a meal that costs $17.95. If all you leave is $3.00, what percent of a tip did
you leave?
Use a Proportion
3
Tip
$3
17.95
Answer
x
3 X 100
= 100
17.95
= X X= 16.71 %
Sentence: If we leave a $3 tip on a bill of $17.95, we are leaving a 16.7 % tip
19. If the 481 children’s books represent 13% of the books in the library, how many total books are in the
library?
Use a Proportion
481
Books 481 – children’s books
𝑋
13
= 100
Answer
481 X 100
13
Sentence: Our library contains 3700 books, 13% of those are Children’s books.
= X X = 3700