101.23% is the change from 81 to 163
Calculation steps:
[( 163 - 81 ) ÷ 81] x 100 = 101.23%
Formula
Percentage change = [(163 - 81) / 81] x 100
Subtract the new number by the original number
163 - 81 = 82
82 ÷ 81 = 1.0123456790123457
1.0123456790123457 x 100 = 101.23%