0.47% is the change from 636 to 639
Calculation steps:
[( 639 - 636 ) ÷ 636] x 100 = 0.47%
Formula
Percentage change = [(639 - 636) / 636] x 100
Subtract the new number by the original number
639 - 636 = 3
3 ÷ 636 = 0.0047169811320754715
0.0047169811320754715 x 100 = 0.47%