0.29% is the change from 686 to 688
Calculation steps:
[( 688 - 686 ) ÷ 686] x 100 = 0.29%
Formula
Percentage change = [(688 - 686) / 686] x 100
Subtract the new number by the original number
688 - 686 = 2
2 ÷ 686 = 0.0029154518950437317
0.0029154518950437317 x 100 = 0.29%