-50.73% is the change from 824 to 406
Calculation steps:
[( 406 - 824 ) ÷ 824] x 100 = -50.73%
Formula
Percentage change = [(406 - 824) / 824] x 100
Subtract the new number by the original number
406 - 824 = -418
-418 ÷ 824 = -0.5072815533980582
-0.5072815533980582 x 100 = -50.73%