100% is the change from 49 to 98
Calculation steps:
[( 98 - 49 ) ÷ 49] x 100 = 100%
Formula
Percentage change = [(98 - 49) / 49] x 100
Subtract the new number by the original number
98 - 49 = 49
49 ÷ 49 = 1
1 x 100 = 100%
Example