800% is the change from 85 to 765
Calculation steps:
[( 765 - 85 ) ÷ 85] x 100 = 800%
Formula
Percentage change = [(765 - 85) / 85] x 100
Subtract the new number by the original number
765 - 85 = 680
680 ÷ 85 = 8
8 x 100 = 800%
Example