2.4% is the change from 668 to 684
Calculation steps:
[( 684 - 668 ) ÷ 668] x 100 = 2.4%
Formula
Percentage change = [(684 - 668) / 668] x 100
Subtract the new number by the original number
684 - 668 = 16
16 ÷ 668 = 0.023952095808383235
0.023952095808383235 x 100 = 2.4%