-87.7% is the change from 691 to 85
Calculation steps:
[( 85 - 691 ) ÷ 691] x 100 = -87.7%
Formula
Percentage change = [(85 - 691) / 691] x 100
Subtract the new number by the original number
85 - 691 = -606
-606 ÷ 691 = -0.8769898697539797
-0.8769898697539797 x 100 = -87.7%