**Finding percent increase or decrease worksheet**** :**

Worksheet on finding percent increase or decrease is much useful to the students who would like to practice problems on finding increment or decrement of a quantity in percentage.

The formula given below can be used to find how an amount changes in terms of percentage.

The change may be an increase or a decrease.

Percent increase describes how much a quantity increases in comparison tothe original amount.

Percent decrease describes how much a quantity decreases in comparison to the original amount.

1. What is the percent increase from $5 to $8 ?

2. Amber got a raise, and her hourly wage increased from $8 to $9.50. What is the percent increase ?

3. The price of a pair of shoes increases from $52 to $64. What is the percent increase to the nearest percent ?

4. In a class, students strength has been increased from 20 to 30. What percent of strength is increased ?

5. Mr. David monthly salary is revised from $2500 to $2600. What percentage is the salary increased ?

6. What is the percent decrease from $80 to $64 ?

7. David moved from a house that is 89 miles away from his workplace to a house that is 51 miles away from his workplace. What is the percent decrease in the distance from his home to his workplace ?

8. The number of students in a chess club decreased from 18 to 12. Whatis the percent decrease ? Round to the nearest percent.

9. Officer Brimberry wrote 16 tickets for traffic violations last week, but only 10 tickets this week. What is the percent decrease ?

10. Over the summer, Jackie played video games 3 hours per day. When school began in the fall, she was only allowed to play video games for half an hour per day. What is the percent decrease? Round to the nearest percent.

**Problem 1 : **

What is the percent increase from $5 to $8 ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 8 - 5

= 3

**Step 2 : **

Percentage change is

= (Amount of change / Original amount) x 100 %

= (3 / 5) x 100%

= 0.6 x 100 %

= 60 %

Hence, the percent increase from $5 to $8 is 60%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 2 : **

Amber got a raise, and her hourly wage increased from $8 to $9.50. What is the percent increase?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 9.50 - 8.00

= 1.50

**Step 2 : **

Find the percent increase. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (1.50 / 8.00) x 100%

= 0.1875 x 100 %

= 18.75 %

**≃ **19 %

Hence, Amber's hourly wage is increased by 19%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 3 : **

The price of a pair of shoes increases from $52 to $64. What is the percent increase to the nearest percent?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 64 - 52

= 12

**Step 2 : **

Find the percent increase. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (12 / 52) x 100%

= 0.2307 x 100 %

= 23.07 %

**≃ **23 %

Hence, the price of a pair of shoes increased by 23%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 4 : **

In a class, students strength has been increased from 20 to 30. What percent of strength is increased ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 30 - 20

= 10

**Step 2 : **

Find the percent increase. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (10 / 20) x 100%

= 0.5 x 100 %

= 50 %

Hence, the strength is increased by 50%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 5 : **

Mr. David monthly salary is revised from $2500 to $2600. What percentage is the salary increased ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 2600 - 2500

= 100

**Step 2 : **

Find the percent increase. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (100 / 2500) x 100%

= 0.04 x 100 %

= 4 %

Hence, David's monthly salary is increased by 4%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 6 : **

What is the percent decrease from $80 to $64 ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 80 - 64

= 16

**Step 2 : **

Percentage change is

= (Amount of change / Original amount) x 100 %

= (16 / 80) x 100%

= 0.2 x 100 %

= 20 %

Hence, the percent decrease from $80 to $64 is 20%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 7 : **

David moved from a house that is 89 miles away from his workplace to a house that is 51 miles away from his workplace. What is the percent decrease in the distance from his home to his workplace ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 89 - 51

= 38

**Step 2 : **

Find the percent decrease. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (38 / 89) x 100%

= 0.427 x 100 %

= 42.7 %

**≃ **43 %

Hence, the percent decrease in the distance from his home to his workplace is 43%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 8 : **

The number of students in a chess club decreased from 18 to 12. Whatis the percent decrease ? Round to the nearest percent.

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 18 - 12

= 6

**Step 2 : **

Find the percent decrease. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (6 / 18) x 100%

= 0.3333 x 100 %

= 33.33%

**≃ **33 %

Hence, the strength is decreased by 33%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 9 : **

Officer Brimberry wrote 16 tickets for traffic violations last week, but only 10 tickets this week. What is the percent decrease ?

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 16 - 10

= 6

**Step 2 : **

Find the percent decrease. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (6 / 16) x 100%

= 0.375 x 100 %

= 37.5 %

**≃ **38 %

Hence, the percentage decrease is 38%.

Let us look at the next problem on "Finding percent increase or decrease worksheet"

**Problem 10 : **

Over the summer, Jackie played video games 3 hours per day. When school began in the fall, she was only allowed to play video games for half an hour per day. What is the percent decrease? Round to the nearest percent

**Solution :**

**Step 1 :**

Find the amount of change.

Amount of change = Greater value - Lesser value

= 3 - 0.5

= 2.5

**Step 2 : **

Find the percent decrease. Round to the nearest percent.

Percentage change is

= (Amount of change / Original amount) x 100 %

= (2.5 / 3) x 100 %

= 0.8333 x 100%

= 83.33 %

**≃ **83 %

Hence, the percentage decrease is 83%.

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