10.99% is the change from 91 to 101
Calculation steps:
[( 101 - 91 ) ÷ 91] x 100 = 10.99%
Formula
Percentage change = [(101 - 91) / 91] x 100
Subtract the new number by the original number
101 - 91 = 10
10 ÷ 91 = 0.10989010989010989
0.10989010989010989 x 100 = 10.99%