-85.9% is the change from 603 to 85
Calculation steps:
[( 85 - 603 ) ÷ 603] x 100 = -85.9%
Formula
Percentage change = [(85 - 603) / 603] x 100
Subtract the new number by the original number
85 - 603 = -518
-518 ÷ 603 = -0.8590381426202321
-0.8590381426202321 x 100 = -85.9%