387.5% is the change from 120 to 585
Calculation steps:
[( 585 - 120 ) ÷ 120] x 100 = 387.5%
Formula
Percentage change = [(585 - 120) / 120] x 100
Subtract the new number by the original number
585 - 120 = 465
465 ÷ 120 = 3.875
3.875 x 100 = 387.5%
Example