-91.41% is the change from 489 to 42
Calculation steps:
[( 42 - 489 ) ÷ 489] x 100 = -91.41%
Formula
Percentage change = [(42 - 489) / 489] x 100
Subtract the new number by the original number
42 - 489 = -447
-447 ÷ 489 = -0.9141104294478528
-0.9141104294478528 x 100 = -91.41%