-86.91% is the change from 489 to 64
Calculation steps:
[( 64 - 489 ) ÷ 489] x 100 = -86.91%
Formula
Percentage change = [(64 - 489) / 489] x 100
Subtract the new number by the original number
64 - 489 = -425
-425 ÷ 489 = -0.869120654396728
-0.869120654396728 x 100 = -86.91%