-66.5% is the change from 609 to 204
Calculation steps:
[( 204 - 609 ) ÷ 609] x 100 = -66.5%
Formula
Percentage change = [(204 - 609) / 609] x 100
Subtract the new number by the original number
204 - 609 = -405
-405 ÷ 609 = -0.6650246305418719
-0.6650246305418719 x 100 = -66.5%