20.78% is the change from 231 to 279
Calculation steps:
[( 279 - 231 ) ÷ 231] x 100 = 20.78%
Formula
Percentage change = [(279 - 231) / 231] x 100
Subtract the new number by the original number
279 - 231 = 48
48 ÷ 231 = 0.2077922077922078
0.2077922077922078 x 100 = 20.78%