-89.1% is the change from 780 to 85
Calculation steps:
[( 85 - 780 ) ÷ 780] x 100 = -89.1%
Formula
Percentage change = [(85 - 780) / 780] x 100
Subtract the new number by the original number
85 - 780 = -695
-695 ÷ 780 = -0.8910256410256411
-0.8910256410256411 x 100 = -89.1%