-1.92% is the change from 677 to 664
Calculation steps:
[( 664 - 677 ) ÷ 677] x 100 = -1.92%
Formula
Percentage change = [(664 - 677) / 677] x 100
Subtract the new number by the original number
664 - 677 = -13
-13 ÷ 677 = -0.019202363367799114
-0.019202363367799114 x 100 = -1.92%