21.65% is the change from 231 to 281
Calculation steps:
[( 281 - 231 ) ÷ 231] x 100 = 21.65%
Formula
Percentage change = [(281 - 231) / 231] x 100
Subtract the new number by the original number
281 - 231 = 50
50 ÷ 231 = 0.21645021645021645
0.21645021645021645 x 100 = 21.65%