-5.17% is the change from 271 to 257
Calculation steps:
[( 257 - 271 ) ÷ 271] x 100 = -5.17%
Formula
Percentage change = [(257 - 271) / 271] x 100
Subtract the new number by the original number
257 - 271 = -14
-14 ÷ 271 = -0.05166051660516605
-0.05166051660516605 x 100 = -5.17%