-97.75% is the change from 489 to 11
Calculation steps:
[( 11 - 489 ) ÷ 489] x 100 = -97.75%
Formula
Percentage change = [(11 - 489) / 489] x 100
Subtract the new number by the original number
11 - 489 = -478
-478 ÷ 489 = -0.9775051124744376
-0.9775051124744376 x 100 = -97.75%