89.9% is the change from 99 to 188
Calculation steps:
[( 188 - 99 ) ÷ 99] x 100 = 89.9%
Formula
Percentage change = [(188 - 99) / 99] x 100
Subtract the new number by the original number
188 - 99 = 89
89 ÷ 99 = 0.898989898989899
0.898989898989899 x 100 = 89.9%