-63.04% is the change from 230 to 85
Calculation steps:
[( 85 - 230 ) ÷ 230] x 100 = -63.04%
Formula
Percentage change = [(85 - 230) / 230] x 100
Subtract the new number by the original number
85 - 230 = -145
-145 ÷ 230 = -0.6304347826086957
-0.6304347826086957 x 100 = -63.04%