-85.76% is the change from 597 to 85
Calculation steps:
[( 85 - 597 ) ÷ 597] x 100 = -85.76%
Formula
Percentage change = [(85 - 597) / 597] x 100
Subtract the new number by the original number
85 - 597 = -512
-512 ÷ 597 = -0.8576214405360134
-0.8576214405360134 x 100 = -85.76%