-40.67% is the change from 509 to 302
Calculation steps:
[( 302 - 509 ) ÷ 509] x 100 = -40.67%
Formula
Percentage change = [(302 - 509) / 509] x 100
Subtract the new number by the original number
302 - 509 = -207
-207 ÷ 509 = -0.4066797642436149
-0.4066797642436149 x 100 = -40.67%