9% is the change from 211 to 230
Calculation steps:
[( 230 - 211 ) ÷ 211] x 100 = 9%
Formula
Percentage change = [(230 - 211) / 211] x 100
Subtract the new number by the original number
230 - 211 = 19
19 ÷ 211 = 0.09004739336492891
0.09004739336492891 x 100 = 9%