-18.64% is the change from 279 to 227
Calculation steps:
[( 227 - 279 ) ÷ 279] x 100 = -18.64%
Formula
Percentage change = [(227 - 279) / 279] x 100
Subtract the new number by the original number
227 - 279 = -52
-52 ÷ 279 = -0.1863799283154122
-0.1863799283154122 x 100 = -18.64%