-13.98% is the change from 279 to 240
Calculation steps:
[( 240 - 279 ) ÷ 279] x 100 = -13.98%
Formula
Percentage change = [(240 - 279) / 279] x 100
Subtract the new number by the original number
240 - 279 = -39
-39 ÷ 279 = -0.13978494623655913
-0.13978494623655913 x 100 = -13.98%