-88.07% is the change from 285 to 34
Calculation steps:
[( 34 - 285 ) ÷ 285] x 100 = -88.07%
Formula
Percentage change = [(34 - 285) / 285] x 100
Subtract the new number by the original number
34 - 285 = -251
-251 ÷ 285 = -0.8807017543859649
-0.8807017543859649 x 100 = -88.07%