-26.09% is the change from 230 to 170
Calculation steps:
[( 170 - 230 ) ÷ 230] x 100 = -26.09%
Formula
Percentage change = [(170 - 230) / 230] x 100
Subtract the new number by the original number
170 - 230 = -60
-60 ÷ 230 = -0.2608695652173913
-0.2608695652173913 x 100 = -26.09%