-3.89% is the change from 489 to 470
Calculation steps:
[( 470 - 489 ) ÷ 489] x 100 = -3.89%
Formula
Percentage change = [(470 - 489) / 489] x 100
Subtract the new number by the original number
470 - 489 = -19
-19 ÷ 489 = -0.03885480572597137
-0.03885480572597137 x 100 = -3.89%