200% is the change from 66 to 198
Calculation steps:
[( 198 - 66 ) ÷ 66] x 100 = 200%
Formula
Percentage change = [(198 - 66) / 66] x 100
Subtract the new number by the original number
198 - 66 = 132
132 ÷ 66 = 2
2 x 100 = 200%
Example