-59.72% is the change from 509 to 205
Calculation steps:
[( 205 - 509 ) ÷ 509] x 100 = -59.72%
Formula
Percentage change = [(205 - 509) / 509] x 100
Subtract the new number by the original number
205 - 509 = -304
-304 ÷ 509 = -0.5972495088408645
-0.5972495088408645 x 100 = -59.72%