-72.2% is the change from 500 to 139
Calculation steps:
[( 139 - 500 ) ÷ 500] x 100 = -72.2%
Formula
Percentage change = [(139 - 500) / 500] x 100
Subtract the new number by the original number
139 - 500 = -361
-361 ÷ 500 = -0.722
-0.722 x 100 = -72.2%