680% is the change from 75 to 585
Calculation steps:
[( 585 - 75 ) ÷ 75] x 100 = 680%
Formula
Percentage change = [(585 - 75) / 75] x 100
Subtract the new number by the original number
585 - 75 = 510
510 ÷ 75 = 6.8
6.8 x 100 = 680%
Example