-13.42% is the change from 313 to 271
Calculation steps:
[( 271 - 313 ) ÷ 313] x 100 = -13.42%
Formula
Percentage change = [(271 - 313) / 313] x 100
Subtract the new number by the original number
271 - 313 = -42
-42 ÷ 313 = -0.134185303514377
-0.134185303514377 x 100 = -13.42%