15.6% is the change from 423 to 489
Calculation steps:
[( 489 - 423 ) ÷ 423] x 100 = 15.6%
Formula
Percentage change = [(489 - 423) / 423] x 100
Subtract the new number by the original number
489 - 423 = 66
66 ÷ 423 = 0.15602836879432624
0.15602836879432624 x 100 = 15.6%