-40.29% is the change from 839 to 501
Calculation steps:
[( 501 - 839 ) ÷ 839] x 100 = -40.29%
Formula
Percentage change = [(501 - 839) / 839] x 100
Subtract the new number by the original number
501 - 839 = -338
-338 ÷ 839 = -0.4028605482717521
-0.4028605482717521 x 100 = -40.29%