-15.13% is the change from 271 to 230
Calculation steps:
[( 230 - 271 ) ÷ 271] x 100 = -15.13%
Formula
Percentage change = [(230 - 271) / 271] x 100
Subtract the new number by the original number
230 - 271 = -41
-41 ÷ 271 = -0.15129151291512916
-0.15129151291512916 x 100 = -15.13%