-86% is the change from 607 to 85
Calculation steps:
[( 85 - 607 ) ÷ 607] x 100 = -86%
Formula
Percentage change = [(85 - 607) / 607] x 100
Subtract the new number by the original number
85 - 607 = -522
-522 ÷ 607 = -0.8599670510708401
-0.8599670510708401 x 100 = -86%