-39.86% is the change from 833 to 501
Calculation steps:
[( 501 - 833 ) ÷ 833] x 100 = -39.86%
Formula
Percentage change = [(501 - 833) / 833] x 100
Subtract the new number by the original number
501 - 833 = -332
-332 ÷ 833 = -0.3985594237695078
-0.3985594237695078 x 100 = -39.86%