7.37% is the change from 638 to 685
Calculation steps:
[( 685 - 638 ) ÷ 638] x 100 = 7.37%
Formula
Percentage change = [(685 - 638) / 638] x 100
Subtract the new number by the original number
685 - 638 = 47
47 ÷ 638 = 0.07366771159874608
0.07366771159874608 x 100 = 7.37%