-36.89% is the change from 824 to 520
Calculation steps:
[( 520 - 824 ) ÷ 824] x 100 = -36.89%
Formula
Percentage change = [(520 - 824) / 824] x 100
Subtract the new number by the original number
520 - 824 = -304
-304 ÷ 824 = -0.36893203883495146
-0.36893203883495146 x 100 = -36.89%