1492.5% is the change from 40 to 637
Calculation steps:
[( 637 - 40 ) ÷ 40] x 100 = 1492.5%
Formula
Percentage change = [(637 - 40) / 40] x 100
Subtract the new number by the original number
637 - 40 = 597
597 ÷ 40 = 14.925
14.925 x 100 = 1492.5%
Example