19800% is the change from 1 to 199
Calculation steps:
[( 199 - 1 ) ÷ 1] x 100 = 19800%
Formula
Percentage change = [(199 - 1) / 1] x 100
Subtract the new number by the original number
199 - 1 = 198
198 ÷ 1 = 198
198 x 100 = 19800%
Example