-21.3% is the change from 230 to 181
Calculation steps:
[( 181 - 230 ) ÷ 230] x 100 = -21.3%
Formula
Percentage change = [(181 - 230) / 230] x 100
Subtract the new number by the original number
181 - 230 = -49
-49 ÷ 230 = -0.21304347826086956
-0.21304347826086956 x 100 = -21.3%