-64.83% is the change from 509 to 179
Calculation steps:
[( 179 - 509 ) ÷ 509] x 100 = -64.83%
Formula
Percentage change = [(179 - 509) / 509] x 100
Subtract the new number by the original number
179 - 509 = -330
-330 ÷ 509 = -0.6483300589390962
-0.6483300589390962 x 100 = -64.83%