-50.84% is the change from 415 to 204
Calculation steps:
[( 204 - 415 ) ÷ 415] x 100 = -50.84%
Formula
Percentage change = [(204 - 415) / 415] x 100
Subtract the new number by the original number
204 - 415 = -211
-211 ÷ 415 = -0.5084337349397591
-0.5084337349397591 x 100 = -50.84%