-88.31% is the change from 77 to 9
Calculation steps:
[( 9 - 77 ) ÷ 77] x 100 = -88.31%
Formula
Percentage change = [(9 - 77) / 77] x 100
Subtract the new number by the original number
9 - 77 = -68
-68 ÷ 77 = -0.8831168831168831
-0.8831168831168831 x 100 = -88.31%