-10.88% is the change from 910 to 811
Calculation steps:
[( 811 - 910 ) ÷ 910] x 100 = -10.88%
Formula
Percentage change = [(811 - 910) / 910] x 100
Subtract the new number by the original number
811 - 910 = -99
-99 ÷ 910 = -0.1087912087912088
-0.1087912087912088 x 100 = -10.88%