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# Help!!!!!,!! watch

1. Our maths teacher gave us a test and never told us we had it!! How do you work out percentage increase and decrease?...?.??
2. '

To calculate percentage decrease:

First: work out the difference (decrease) between the two numbers you are comparing.
Decrease = Original Number - New Number
Then: divide the decrease by the original number and multiply the answer by 100.
% Decrease = Decrease ÷ Original Number × 100
If your answer is a negative number then this is a percentage increase.
If you wish to calculate the percentage increase or decrease of several numbers then we recommend using the first formula. Positive values indicate a percentage increase whereas negative values indicate percentage decrease.

https://www.skillsyouneed.com/num/percent-change.html

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Updated: November 2, 2017
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