-89.7% is the change from 825 to 85
Calculation steps:
[( 85 - 825 ) ÷ 825] x 100 = -89.7%
Formula
Percentage change = [(85 - 825) / 825] x 100
Subtract the new number by the original number
85 - 825 = -740
-740 ÷ 825 = -0.896969696969697
-0.896969696969697 x 100 = -89.7%