211.11% is the change from 99 to 308
Calculation steps:
[( 308 - 99 ) ÷ 99] x 100 = 211.11%
Formula
Percentage change = [(308 - 99) / 99] x 100
Subtract the new number by the original number
308 - 99 = 209
209 ÷ 99 = 2.111111111111111
2.111111111111111 x 100 = 211.11%