-97.34% is the change from 489 to 13
Calculation steps:
[( 13 - 489 ) ÷ 489] x 100 = -97.34%
Formula
Percentage change = [(13 - 489) / 489] x 100
Subtract the new number by the original number
13 - 489 = -476
-476 ÷ 489 = -0.9734151329243353
-0.9734151329243353 x 100 = -97.34%