4900% is the change from 2 to 100
Calculation steps:
[( 100 - 2 ) ÷ 2] x 100 = 4900%
Formula
Percentage change = [(100 - 2) / 2] x 100
Subtract the new number by the original number
100 - 2 = 98
98 ÷ 2 = 49
49 x 100 = 4900%
Example