Sunday, November 20, 2011

If A is p% less than B, then B is.....

If A is p% less than B, then B is
(100 × p / (100 - p))% more than A.

Proof:
Assume B = 100.
Then A = (100 - p).

when A is (100 - p), B is more than A by p.
So, when A is 100, B is more than A by (p / (100 - p)) × 100.

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