9800% is the change from 2 to 198
Calculation steps:
[( 198 - 2 ) ÷ 2] x 100 = 9800%
Formula
Percentage change = [(198 - 2) / 2] x 100
Subtract the new number by the original number
198 - 2 = 196
196 ÷ 2 = 98
98 x 100 = 9800%
Example