-1.62% is the change from 678 to 667
Calculation steps:
[( 667 - 678 ) ÷ 678] x 100 = -1.62%
Formula
Percentage change = [(667 - 678) / 678] x 100
Subtract the new number by the original number
667 - 678 = -11
-11 ÷ 678 = -0.016224188790560472
-0.016224188790560472 x 100 = -1.62%