-90.32% is the change from 93 to 9
Calculation steps:
[( 9 - 93 ) ÷ 93] x 100 = -90.32%
Formula
Percentage change = [(9 - 93) / 93] x 100
Subtract the new number by the original number
9 - 93 = -84
-84 ÷ 93 = -0.9032258064516129
-0.9032258064516129 x 100 = -90.32%