-24.79% is the change from 815 to 613
Calculation steps:
[( 613 - 815 ) ÷ 815] x 100 = -24.79%
Formula
Percentage change = [(613 - 815) / 815] x 100
Subtract the new number by the original number
613 - 815 = -202
-202 ÷ 815 = -0.24785276073619633
-0.24785276073619633 x 100 = -24.79%