-50.18% is the change from 285 to 142
Calculation steps:
[( 142 - 285 ) ÷ 285] x 100 = -50.18%
Formula
Percentage change = [(142 - 285) / 285] x 100
Subtract the new number by the original number
142 - 285 = -143
-143 ÷ 285 = -0.5017543859649123
-0.5017543859649123 x 100 = -50.18%