-3.6% is the change from 278 to 268
Calculation steps:
[( 268 - 278 ) ÷ 278] x 100 = -3.6%
Formula
Percentage change = [(268 - 278) / 278] x 100
Subtract the new number by the original number
268 - 278 = -10
-10 ÷ 278 = -0.03597122302158273
-0.03597122302158273 x 100 = -3.6%