1512.5% is the change from 40 to 645
Calculation steps:
[( 645 - 40 ) ÷ 40] x 100 = 1512.5%
Formula
Percentage change = [(645 - 40) / 40] x 100
Subtract the new number by the original number
645 - 40 = 605
605 ÷ 40 = 15.125
15.125 x 100 = 1512.5%
Example