-82.62% is the change from 489 to 85
Calculation steps:
[( 85 - 489 ) ÷ 489] x 100 = -82.62%
Formula
Percentage change = [(85 - 489) / 489] x 100
Subtract the new number by the original number
85 - 489 = -404
-404 ÷ 489 = -0.8261758691206544
-0.8261758691206544 x 100 = -82.62%