-88.04% is the change from 677 to 81
Calculation steps:
[( 81 - 677 ) ÷ 677] x 100 = -88.04%
Formula
Percentage change = [(81 - 677) / 677] x 100
Subtract the new number by the original number
81 - 677 = -596
-596 ÷ 677 = -0.880354505169867
-0.880354505169867 x 100 = -88.04%