-13.97% is the change from 315 to 271
Calculation steps:
[( 271 - 315 ) ÷ 315] x 100 = -13.97%
Formula
Percentage change = [(271 - 315) / 315] x 100
Subtract the new number by the original number
271 - 315 = -44
-44 ÷ 315 = -0.13968253968253969
-0.13968253968253969 x 100 = -13.97%