0.15% is the change from 684 to 685
Calculation steps:
[( 685 - 684 ) ÷ 684] x 100 = 0.15%
Formula
Percentage change = [(685 - 684) / 684] x 100
Subtract the new number by the original number
685 - 684 = 1
1 ÷ 684 = 0.0014619883040935672
0.0014619883040935672 x 100 = 0.15%