-91.06% is the change from 906 to 81
Calculation steps:
[( 81 - 906 ) ÷ 906] x 100 = -91.06%
Formula
Percentage change = [(81 - 906) / 906] x 100
Subtract the new number by the original number
81 - 906 = -825
-825 ÷ 906 = -0.9105960264900662
-0.9105960264900662 x 100 = -91.06%