-36.27% is the change from 816 to 520
Calculation steps:
[( 520 - 816 ) ÷ 816] x 100 = -36.27%
Formula
Percentage change = [(520 - 816) / 816] x 100
Subtract the new number by the original number
520 - 816 = -296
-296 ÷ 816 = -0.3627450980392157
-0.3627450980392157 x 100 = -36.27%