4.07% is the change from 221 to 230
Calculation steps:
[( 230 - 221 ) ÷ 221] x 100 = 4.07%
Formula
Percentage change = [(230 - 221) / 221] x 100
Subtract the new number by the original number
230 - 221 = 9
9 ÷ 221 = 0.04072398190045249
0.04072398190045249 x 100 = 4.07%