-91.74% is the change from 109 to 9
Calculation steps:
[( 9 - 109 ) ÷ 109] x 100 = -91.74%
Formula
Percentage change = [(9 - 109) / 109] x 100
Subtract the new number by the original number
9 - 109 = -100
-100 ÷ 109 = -0.9174311926605505
-0.9174311926605505 x 100 = -91.74%