-39.62% is the change from 833 to 503
Calculation steps:
[( 503 - 833 ) ÷ 833] x 100 = -39.62%
Formula
Percentage change = [(503 - 833) / 833] x 100
Subtract the new number by the original number
503 - 833 = -330
-330 ÷ 833 = -0.39615846338535415
-0.39615846338535415 x 100 = -39.62%