81.82% is the change from 99 to 180
Calculation steps:
[( 180 - 99 ) ÷ 99] x 100 = 81.82%
Formula
Percentage change = [(180 - 99) / 99] x 100
Subtract the new number by the original number
180 - 99 = 81
81 ÷ 99 = 0.8181818181818182
0.8181818181818182 x 100 = 81.82%