-68.97% is the change from 29 to 9
Calculation steps:
[( 9 - 29 ) ÷ 29] x 100 = -68.97%
Formula
Percentage change = [(9 - 29) / 29] x 100
Subtract the new number by the original number
9 - 29 = -20
-20 ÷ 29 = -0.6896551724137931
-0.6896551724137931 x 100 = -68.97%