1550% is the change from 12 to 198
Calculation steps:
[( 198 - 12 ) ÷ 12] x 100 = 1550%
Formula
Percentage change = [(198 - 12) / 12] x 100
Subtract the new number by the original number
198 - 12 = 186
186 ÷ 12 = 15.5
15.5 x 100 = 1550%
Example