1612.5% is the change from 40 to 685
Calculation steps:
[( 685 - 40 ) ÷ 40] x 100 = 1612.5%
Formula
Percentage change = [(685 - 40) / 40] x 100
Subtract the new number by the original number
685 - 40 = 645
645 ÷ 40 = 16.125
16.125 x 100 = 1612.5%
Example