1615% is the change from 40 to 686
Calculation steps:
[( 686 - 40 ) ÷ 40] x 100 = 1615%
Formula
Percentage change = [(686 - 40) / 40] x 100
Subtract the new number by the original number
686 - 40 = 646
646 ÷ 40 = 16.15
16.15 x 100 = 1615%
Example