-17.79% is the change from 489 to 402
Calculation steps:
[( 402 - 489 ) ÷ 489] x 100 = -17.79%
Formula
Percentage change = [(402 - 489) / 489] x 100
Subtract the new number by the original number
402 - 489 = -87
-87 ÷ 489 = -0.17791411042944785
-0.17791411042944785 x 100 = -17.79%