6.83% is the change from 644 to 688
Calculation steps:
[( 688 - 644 ) ÷ 644] x 100 = 6.83%
Formula
Percentage change = [(688 - 644) / 644] x 100
Subtract the new number by the original number
688 - 644 = 44
44 ÷ 644 = 0.06832298136645963
0.06832298136645963 x 100 = 6.83%