9.42% is the change from 191 to 209
Calculation steps:
[( 209 - 191 ) ÷ 191] x 100 = 9.42%
Formula
Percentage change = [(209 - 191) / 191] x 100
Subtract the new number by the original number
209 - 191 = 18
18 ÷ 191 = 0.09424083769633508
0.09424083769633508 x 100 = 9.42%