-20.65% is the change from 489 to 388
Calculation steps:
[( 388 - 489 ) ÷ 489] x 100 = -20.65%
Formula
Percentage change = [(388 - 489) / 489] x 100
Subtract the new number by the original number
388 - 489 = -101
-101 ÷ 489 = -0.2065439672801636
-0.2065439672801636 x 100 = -20.65%