-66.17% is the change from 603 to 204
Calculation steps:
[( 204 - 603 ) ÷ 603] x 100 = -66.17%
Formula
Percentage change = [(204 - 603) / 603] x 100
Subtract the new number by the original number
204 - 603 = -399
-399 ÷ 603 = -0.6616915422885572
-0.6616915422885572 x 100 = -66.17%