Name
LESSON
Date
Class
Practice A
6-5 Applying Percent of Increase and Decrease
State whether each change represents an increase or decrease.
1. from 10 to 15
2. from 16 to 12
3. from 8 to 14
Find each percent increase or decrease to the nearest percent.
4. from 2 to 5
5. from 10 to 6
6. from 12 to 18
7. from 8 to 5.6
8. from 15 to 8
9. from 21 to 15
10. from 17 to 21
11. from 10 to 2
12. from 4 to 9
13. from 7 to 11
14. from 3 to 9
15. from 12 to 5
16. World Toys buys bicycles for $38 and sells them for $95.
What is the percent of increase in the price?
17. Jack bought a stereo on sale for $231. The original price
was $385. What was the percent of decrease in price?
18. Adams Clothing Store buys coats for $50 and sells them
for $80. What percent of increase is this?
19. Asabi’s average in math for the first quarter of the school
year was 75. His second quarter average was 81. What was
the percent of increase in Asabi’s grade?
20. A shoe store is selling athletic shoes at 30% off the regular
price. If the regular price of a pair of athletic shoes is $45,
what is the sale price?
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41
Holt Mathematics
Practice A
6-5 Applying Percent of Increase and Decrease
Practice B
6-5 Applying Percent of Increase and Decrease
LESSON
LESSON
State whether each change represents an increase or decrease.
1. from 10 to 15
2. from 16 to 12
increase
Find each percent increase or decrease to the nearest percent.
3. from 8 to 14
decrease
1. from 16 to 20
increase
increase 25%
5. from 10 to 6
increase 150%
7. from 8 to 5.6
6. from 12 to 18
decrease 40%
8. from 15 to 8
decrease 30%
10. from 17 to 21
decrease 47%
11. from 10 to 2
increase 24%
13. from 7 to 11
decrease 80%
14. from 3 to 9
increase 57%
increase 200%
16. World Toys buys bicycles for $38 and sells them for $95.
What is the percent of increase in the price?
150%
17. Jack bought a stereo on sale for $231. The original price
was $385. What was the percent of decrease in price?
40%
18. Adams Clothing Store buys coats for $50 and sells them
for $80. What percent of increase is this?
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16. Mr. Havel bought a car for $2400 and sold it for $2700.
What was the percent of profit for Mr. Havel in selling the car?
12.5%
17. A computer store buys a computer program for $24 and
sells it for $91.20. What is the percent of increase in the
price?
280%
Holt Mathematics
increase 35%
increase 110%
decrease 44%
decrease 35%
6. from 153 to 109
increase 67%
Holt Mathematics
To find the percent increase or decrease:
• Find the amount of change by subtracting the lesser
number from the greater.
amount of change
• Write a fraction: percent increase or decrease original amount
• If possible, simplify the fraction.
3. from 72 to 46.8
5. from 67 to 112
20%
LESSON
Find each percent increase or decrease to the nearest percent.
4. from 90 to 189
$33,372
Review for Mastery
6-5 Applying Percent of Increase and Decrease
Practice C
6-5 Applying Percent of Increase and Decrease
2. from 84 to 47.04
18%
42
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LESSON
1. from 120 to 162
decrease 63%
20. Marlis has 765 cards in her baseball card collection.
She sells 153 of the cards. What is the percent of
decrease in the number of cards in the collection?
$31.50
41
increase 75%
19. Richard earns $2700 a month. He received a 3% raise.
What is Richard’s new annual salary?
8%
20. A shoe store is selling athletic shoes at 30% off the regular
price. If the regular price of a pair of athletic shoes is $45,
what is the sale price?
15. from 89 to 32.9
18. A manufacturing company with 450 employees begins
a new product line and must add 81 more employees.
What is the percent of increase in the number of employees?
60%
19. Asabi’s average in math for the first quarter of the school
year was 75. His second quarter average was 81. What was
the percent of increase in Asabi’s grade?
decrease 13%
14. from 78 to 136.5
decrease 43%
decrease 58%
12. from 38 to 33
increase 120%
13. from 64 to 36.4
15. from 12 to 5
decrease 20%
11. from 42 to 92.4
increase 86%
increase 125%
9. from 90 to 72
decrease 12%
10. from 29 to 54
12. from 4 to 9
increase 40%
8. from 24.5 to 21.56
increase 45%
decrease 29%
6. from 45 to 63
increase 15%
7. from 18 to 26.1
9. from 21 to 15
increase 100%
5. from 40 to 46
decrease 40%
increase 50%
3. from 15 to 30
decrease 20%
4. from 35 to 21
Find each percent increase or decrease to the nearest percent.
4. from 2 to 5
2. from 30 to 24
• Rewrite the fraction as a percent.
The temperature increased from 60°F to 75°F.
Find the percent of increase.
decrease 29%
75° 60°
15°
1
25%
percent of increase 60°
60°
4
Find each missing number.
7. originally: $300
8. originally: $850
Complete to find each percent increase or decrease.
new price: $450
50
new price: $1147.50
35
% increase
9. originally: $2500
67
60% decrease
11. originally: $200
new price: $6.09
45
137% increase
14. Denise buys a shirt on sale for $21.08. This represents
a 15% decrease in price. What was the original price
of the shirt?
15. A storeowner purchases 40 shirts for $600. She then
adds 40% to her cost and tags each shirt with the same
selling price. What is the amount of profit for each shirt?
43
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25
2. Savings
increased from
$500 to $750.
750 500
1
4
%
3. Enrollment
decreased from
1000 to 950.
% increase
13. Fandango Store buys a computer program for $244. It sells
the computer program for $927.20. What is the percent of
increase in the price?
20
20
80
12. originally: $4.20
474
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100 80
2100
new price: $840
% decrease
new price: $
% increase
10. originally: $
new price: $825
1. Membership
increased from
80 to 100.
50
$24.80
5
%
amount of increase
percent increase original amount
%
Change the fraction to a percent.
Find the amount of
decrease.
75 60
50
5
1000
100
50
1
2
4. Temperature
decreased from
75°F to 60°F.
1000 950
280%
250
250
500
Find the amount of increase.
15
amount of decrease
percent decrease 15
3
20
75
15
100
20
original amount
Change the fraction to a percent.
%
$6
Holt Mathematics
81
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All rights reserved.
44
Holt Mathematics
Holt Mathematics