99.01% is the change from 101 to 201
Calculation steps:
[( 201 - 101 ) ÷ 101] x 100 = 99.01%
Formula
Percentage change = [(201 - 101) / 101] x 100
Subtract the new number by the original number
201 - 101 = 100
100 ÷ 101 = 0.9900990099009901
0.9900990099009901 x 100 = 99.01%