-1.31% is the change from 687 to 678
Calculation steps:
[( 678 - 687 ) ÷ 687] x 100 = -1.31%
Formula
Percentage change = [(678 - 687) / 687] x 100
Subtract the new number by the original number
678 - 687 = -9
-9 ÷ 687 = -0.013100436681222707
-0.013100436681222707 x 100 = -1.31%