To determine percentage increase, divide the change by the original number. An increase from 25 to 75 is calculated in this manner. The difference is 50. 50/25 = 2. That figure times 100 = 200%, or an increase of 200%. Decrease is the exact same process. To determine the percentage decrease, make these calculations. A decrease from 75 to 50 works is calculated in this manner. 25/75 = .33, or a 33% decrease. In order to figure a percentage increase of anything, multiply the number by the percentage. For example if you have a number of 100 and you wish to increase it by 50%, multiply 100 by 1.50 and get the result of 150. To determine the percent decrease of a number would be calculated like this. A 25% decrease of 100 is found by multiplying 100 by (100% - 25%) .75, or 75.
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Updated: 8/9/11 |