-17.92% is the change from 279 to 229
Calculation steps:
[( 229 - 279 ) ÷ 279] x 100 = -17.92%
Formula
Percentage change = [(229 - 279) / 279] x 100
Subtract the new number by the original number
229 - 279 = -50
-50 ÷ 279 = -0.17921146953405018
-0.17921146953405018 x 100 = -17.92%