-4.29% is the change from 280 to 268
Calculation steps:
[( 268 - 280 ) ÷ 280] x 100 = -4.29%
Formula
Percentage change = [(268 - 280) / 280] x 100
Subtract the new number by the original number
268 - 280 = -12
-12 ÷ 280 = -0.04285714285714286
-0.04285714285714286 x 100 = -4.29%