-86.92% is the change from 650 to 85
Calculation steps:
[( 85 - 650 ) ÷ 650] x 100 = -86.92%
Formula
Percentage change = [(85 - 650) / 650] x 100
Subtract the new number by the original number
85 - 650 = -565
-565 ÷ 650 = -0.8692307692307693
-0.8692307692307693 x 100 = -86.92%