-89.77% is the change from 88 to 9
Calculation steps:
[( 9 - 88 ) ÷ 88] x 100 = -89.77%
Formula
Percentage change = [(9 - 88) / 88] x 100
Subtract the new number by the original number
9 - 88 = -79
-79 ÷ 88 = -0.8977272727272727
-0.8977272727272727 x 100 = -89.77%