-90.91% is the change from 11 to 1
Calculation steps:
[( 1 - 11 ) ÷ 11] x 100 = -90.91%
Formula
Percentage change = [(1 - 11) / 11] x 100
Subtract the new number by the original number
1 - 11 = -10
-10 ÷ 11 = -0.9090909090909091
-0.9090909090909091 x 100 = -90.91%