2.53% is the change from 671 to 688
Calculation steps:
[( 688 - 671 ) ÷ 671] x 100 = 2.53%
Formula
Percentage change = [(688 - 671) / 671] x 100
Subtract the new number by the original number
688 - 671 = 17
17 ÷ 671 = 0.02533532041728763
0.02533532041728763 x 100 = 2.53%