-17.54% is the change from 285 to 235
Calculation steps:
[( 235 - 285 ) ÷ 285] x 100 = -17.54%
Formula
Percentage change = [(235 - 285) / 285] x 100
Subtract the new number by the original number
235 - 285 = -50
-50 ÷ 285 = -0.17543859649122806
-0.17543859649122806 x 100 = -17.54%