-95.71% is the change from 489 to 21
Calculation steps:
[( 21 - 489 ) ÷ 489] x 100 = -95.71%
Formula
Percentage change = [(21 - 489) / 489] x 100
Subtract the new number by the original number
21 - 489 = -468
-468 ÷ 489 = -0.9570552147239264
-0.9570552147239264 x 100 = -95.71%