Percentage Increase Or Decrease

To find the percentage increase or decrease

Step 1: Calculate the change in value

Step 2: Divide by the original value (i.e. the value before increase or decrease)

Step 3: Multiply by 100%

Percentage increase =

Percentage Increase

Example:

What is the percentage increase from 25 to 29.5?

Solution:

Increase = 29.5 – 25 = 4.5

Percentage increase =

Example:

Last month, Zainal earned RM500. This month he earned RM520. Calculate the percentage increase in his earnings.

Solution :

Increase = RM520 – RM500 = RM20

Percentage increase =

The percentage increase in his earnings is 4%.

Percentage Decrease

Example:

What is the percentage decrease from 20 to 15 ?

Solution:

Decrease = 20 – 15 = 4 =

Percentage decrease = = 24%

Example:

Last month, Paul earned RM500. This month he earned RM450. Calculate the percentage decrease in his earnings.

Solution :

Decrease = RM500 – RM450 = RM50

Percentage decrease =

The percentage decrease in his earnings is 10%.

The following video shows more examples of percentage problems

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