10.05% is the change from 209 to 230
Calculation steps:
[( 230 - 209 ) ÷ 209] x 100 = 10.05%
Formula
Percentage change = [(230 - 209) / 209] x 100
Subtract the new number by the original number
230 - 209 = 21
21 ÷ 209 = 0.10047846889952153
0.10047846889952153 x 100 = 10.05%