200% is the change from 120 to 360
Calculation steps:
[( 360 - 120 ) ÷ 120] x 100 = 200%
Formula
Percentage change = [(360 - 120) / 120] x 100
Subtract the new number by the original number
360 - 120 = 240
240 ÷ 120 = 2
2 x 100 = 200%
Example