-1.43% is the change from 280 to 276
Calculation steps:
[( 276 - 280 ) ÷ 280] x 100 = -1.43%
Formula
Percentage change = [(276 - 280) / 280] x 100
Subtract the new number by the original number
276 - 280 = -4
-4 ÷ 280 = -0.014285714285714285
-0.014285714285714285 x 100 = -1.43%