1.25% is the change from 639 to 647
Calculation steps:
[( 647 - 639 ) ÷ 639] x 100 = 1.25%
Formula
Percentage change = [(647 - 639) / 639] x 100
Subtract the new number by the original number
647 - 639 = 8
8 ÷ 639 = 0.012519561815336464
0.012519561815336464 x 100 = 1.25%