104.94% is the change from 81 to 166
Calculation steps:
[( 166 - 81 ) ÷ 81] x 100 = 104.94%
Formula
Percentage change = [(166 - 81) / 81] x 100
Subtract the new number by the original number
166 - 81 = 85
85 ÷ 81 = 1.0493827160493827
1.0493827160493827 x 100 = 104.94%