-82.76% is the change from 493 to 85
Calculation steps:
[( 85 - 493 ) ÷ 493] x 100 = -82.76%
Formula
Percentage change = [(85 - 493) / 493] x 100
Subtract the new number by the original number
85 - 493 = -408
-408 ÷ 493 = -0.8275862068965517
-0.8275862068965517 x 100 = -82.76%