-27.83% is the change from 230 to 166
Calculation steps:
[( 166 - 230 ) ÷ 230] x 100 = -27.83%
Formula
Percentage change = [(166 - 230) / 230] x 100
Subtract the new number by the original number
166 - 230 = -64
-64 ÷ 230 = -0.2782608695652174
-0.2782608695652174 x 100 = -27.83%