2.54% is the change from 631 to 647
Calculation steps:
[( 647 - 631 ) ÷ 631] x 100 = 2.54%
Formula
Percentage change = [(647 - 631) / 631] x 100
Subtract the new number by the original number
647 - 631 = 16
16 ÷ 631 = 0.025356576862123614
0.025356576862123614 x 100 = 2.54%