-59.53% is the change from 509 to 206
Calculation steps:
[( 206 - 509 ) ÷ 509] x 100 = -59.53%
Formula
Percentage change = [(206 - 509) / 509] x 100
Subtract the new number by the original number
206 - 509 = -303
-303 ÷ 509 = -0.5952848722986247
-0.5952848722986247 x 100 = -59.53%