1680% is the change from 40 to 712
Calculation steps:
[( 712 - 40 ) ÷ 40] x 100 = 1680%
Formula
Percentage change = [(712 - 40) / 40] x 100
Subtract the new number by the original number
712 - 40 = 672
672 ÷ 40 = 16.8
16.8 x 100 = 1680%
Example