How to Calculate Percent Increase or Decrease in Math: Step-by-Step Guide with Examples

percent increase or decrease

difference/original wholeex- 50 to 75 whats % increase75-50=2525/50= .50 = 50% increase

Percent increase or decrease refers to the percentage change in a quantity from its original value to a new value. It is a way to express the magnitude of change in a numerical value.

To calculate percent increase or decrease, you need to use the following formula:

% change = (new value – old value) / old value x 100

If the result is a positive number, it means there was an increase. If the result is a negative number, it means there was a decrease.

For example, let’s say the original value (old value) of a house was $200,000 and the new value is $240,000. To calculate the percent increase, you would use the formula:

% increase = (240,000 – 200,000) / 200,000 x 100
% increase = 20%

So, the house increased in value by 20%.

Similarly, let’s say a person’s weight was 150 pounds and they lost 10 pounds. To calculate the percent decrease, you would use the formula:

% decrease = (150 – 140) / 150 x 100
% decrease = 6.67%

So, the person’s weight decreased by 6.67%.

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