-90.83% is the change from 109 to 10
Calculation steps:
[( 10 - 109 ) ÷ 109] x 100 = -90.83%
Formula
Percentage change = [(10 - 109) / 109] x 100
Subtract the new number by the original number
10 - 109 = -99
-99 ÷ 109 = -0.908256880733945
-0.908256880733945 x 100 = -90.83%