2.55% is the change from 667 to 684
Calculation steps:
[( 684 - 667 ) ÷ 667] x 100 = 2.55%
Formula
Percentage change = [(684 - 667) / 667] x 100
Subtract the new number by the original number
684 - 667 = 17
17 ÷ 667 = 0.025487256371814093
0.025487256371814093 x 100 = 2.55%