-72.69% is the change from 509 to 139
Calculation steps:
[( 139 - 509 ) ÷ 509] x 100 = -72.69%
Formula
Percentage change = [(139 - 509) / 509] x 100
Subtract the new number by the original number
139 - 509 = -370
-370 ÷ 509 = -0.7269155206286837
-0.7269155206286837 x 100 = -72.69%