-52.31% is the change from 824 to 393
Calculation steps:
[( 393 - 824 ) ÷ 824] x 100 = -52.31%
Formula
Percentage change = [(393 - 824) / 824] x 100
Subtract the new number by the original number
393 - 824 = -431
-431 ÷ 824 = -0.5230582524271845
-0.5230582524271845 x 100 = -52.31%