-72.5% is the change from 509 to 140
Calculation steps:
[( 140 - 509 ) ÷ 509] x 100 = -72.5%
Formula
Percentage change = [(140 - 509) / 509] x 100
Subtract the new number by the original number
140 - 509 = -369
-369 ÷ 509 = -0.724950884086444
-0.724950884086444 x 100 = -72.5%