-10.04% is the change from 279 to 251
Calculation steps:
[( 251 - 279 ) ÷ 279] x 100 = -10.04%
Formula
Percentage change = [(251 - 279) / 279] x 100
Subtract the new number by the original number
251 - 279 = -28
-28 ÷ 279 = -0.1003584229390681
-0.1003584229390681 x 100 = -10.04%