7.17% is the change from 642 to 688
Calculation steps:
[( 688 - 642 ) ÷ 642] x 100 = 7.17%
Formula
Percentage change = [(688 - 642) / 642] x 100
Subtract the new number by the original number
688 - 642 = 46
46 ÷ 642 = 0.07165109034267912
0.07165109034267912 x 100 = 7.17%