-3.5% is the change from 286 to 276
Calculation steps:
[( 276 - 286 ) ÷ 286] x 100 = -3.5%
Formula
Percentage change = [(276 - 286) / 286] x 100
Subtract the new number by the original number
276 - 286 = -10
-10 ÷ 286 = -0.03496503496503497
-0.03496503496503497 x 100 = -3.5%