-17.56% is the change from 279 to 230
Calculation steps:
[( 230 - 279 ) ÷ 279] x 100 = -17.56%
Formula
Percentage change = [(230 - 279) / 279] x 100
Subtract the new number by the original number
230 - 279 = -49
-49 ÷ 279 = -0.17562724014336917
-0.17562724014336917 x 100 = -17.56%