50.51% is the change from 99 to 149
Calculation steps:
[( 149 - 99 ) ÷ 99] x 100 = 50.51%
Formula
Percentage change = [(149 - 99) / 99] x 100
Subtract the new number by the original number
149 - 99 = 50
50 ÷ 99 = 0.5050505050505051
0.5050505050505051 x 100 = 50.51%