90.91% is the change from 99 to 189
Calculation steps:
[( 189 - 99 ) ÷ 99] x 100 = 90.91%
Formula
Percentage change = [(189 - 99) / 99] x 100
Subtract the new number by the original number
189 - 99 = 90
90 ÷ 99 = 0.9090909090909091
0.9090909090909091 x 100 = 90.91%