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The percentage increase (or decrease) from "a" to "b" is:((b - a) / a) x 100
Equivalent to:
(b/a - 1) x 100
In other words, you calculate the difference between the two values, and compare with the first one.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoSuppose the two values are X and Y. It is important to determine if you need the percentage difference from X to Y or from Y to X. The context should provide the answer.
The difference between them (from X to Y) is Y - X.
The relative difference is (Y - X)/X = Y/X - 1
and the percentage difference is 100*(Y - X)/X = 100*(Y/X - 1) = 100*Y/X - 100.
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