15.24% is the change from 105 to 121
Calculation steps:
[( 121 - 105 ) ÷ 105] x 100 = 15.24%
Formula
Percentage change = [(121 - 105) / 105] x 100
Subtract the new number by the original number
121 - 105 = 16
16 ÷ 105 = 0.1523809523809524
0.1523809523809524 x 100 = 15.24%