100% is the change from 360 to 720
Calculation steps:
[( 720 - 360 ) ÷ 360] x 100 = 100%
Formula
Percentage change = [(720 - 360) / 360] x 100
Subtract the new number by the original number
720 - 360 = 360
360 ÷ 360 = 1
1 x 100 = 100%
Example