111.11% is the change from 99 to 209
Calculation steps:
[( 209 - 99 ) ÷ 99] x 100 = 111.11%
Formula
Percentage change = [(209 - 99) / 99] x 100
Subtract the new number by the original number
209 - 99 = 110
110 ÷ 99 = 1.1111111111111112
1.1111111111111112 x 100 = 111.11%