-40.33% is the change from 838 to 500
Calculation steps:
[( 500 - 838 ) ÷ 838] x 100 = -40.33%
Formula
Percentage change = [(500 - 838) / 838] x 100
Subtract the new number by the original number
500 - 838 = -338
-338 ÷ 838 = -0.4033412887828162
-0.4033412887828162 x 100 = -40.33%