-5.19% is the change from 270 to 256
Calculation steps:
[( 256 - 270 ) ÷ 270] x 100 = -5.19%
Formula
Percentage change = [(256 - 270) / 270] x 100
Subtract the new number by the original number
256 - 270 = -14
-14 ÷ 270 = -0.05185185185185185
-0.05185185185185185 x 100 = -5.19%