-10.75% is the change from 279 to 249
Calculation steps:
[( 249 - 279 ) ÷ 279] x 100 = -10.75%
Formula
Percentage change = [(249 - 279) / 279] x 100
Subtract the new number by the original number
249 - 279 = -30
-30 ÷ 279 = -0.10752688172043011
-0.10752688172043011 x 100 = -10.75%