-50.6% is the change from 415 to 205
Calculation steps:
[( 205 - 415 ) ÷ 415] x 100 = -50.6%
Formula
Percentage change = [(205 - 415) / 415] x 100
Subtract the new number by the original number
205 - 415 = -210
-210 ÷ 415 = -0.5060240963855421
-0.5060240963855421 x 100 = -50.6%