-88.46% is the change from 78 to 9
Calculation steps:
[( 9 - 78 ) ÷ 78] x 100 = -88.46%
Formula
Percentage change = [(9 - 78) / 78] x 100
Subtract the new number by the original number
9 - 78 = -69
-69 ÷ 78 = -0.8846153846153846
-0.8846153846153846 x 100 = -88.46%