-86.91% is the change from 779 to 102
Calculation steps:
[( 102 - 779 ) ÷ 779] x 100 = -86.91%
Formula
Percentage change = [(102 - 779) / 779] x 100
Subtract the new number by the original number
102 - 779 = -677
-677 ÷ 779 = -0.8690629011553274
-0.8690629011553274 x 100 = -86.91%