-79.47% is the change from 677 to 139
Calculation steps:
[( 139 - 677 ) ÷ 677] x 100 = -79.47%
Formula
Percentage change = [(139 - 677) / 677] x 100
Subtract the new number by the original number
139 - 677 = -538
-538 ÷ 677 = -0.794682422451994
-0.794682422451994 x 100 = -79.47%