-38.96% is the change from 824 to 503
Calculation steps:
[( 503 - 824 ) ÷ 824] x 100 = -38.96%
Formula
Percentage change = [(503 - 824) / 824] x 100
Subtract the new number by the original number
503 - 824 = -321
-321 ÷ 824 = -0.3895631067961165
-0.3895631067961165 x 100 = -38.96%