700% is the change from 85 to 680
Calculation steps:
[( 680 - 85 ) ÷ 85] x 100 = 700%
Formula
Percentage change = [(680 - 85) / 85] x 100
Subtract the new number by the original number
680 - 85 = 595
595 ÷ 85 = 7
7 x 100 = 700%
Example