81.82% is the change from 11 to 20
Calculation steps:
[( 20 - 11 ) ÷ 11] x 100 = 81.82%
Formula
Percentage change = [(20 - 11) / 11] x 100
Subtract the new number by the original number
20 - 11 = 9
9 ÷ 11 = 0.8181818181818182
0.8181818181818182 x 100 = 81.82%