-34.76% is the change from 489 to 319
Calculation steps:
[( 319 - 489 ) ÷ 489] x 100 = -34.76%
Formula
Percentage change = [(319 - 489) / 489] x 100
Subtract the new number by the original number
319 - 489 = -170
-170 ÷ 489 = -0.3476482617586912
-0.3476482617586912 x 100 = -34.76%