-1.36% is the change from 811 to 800
Calculation steps:
[( 800 - 811 ) ÷ 811] x 100 = -1.36%
Formula
Percentage change = [(800 - 811) / 811] x 100
Subtract the new number by the original number
800 - 811 = -11
-11 ÷ 811 = -0.013563501849568433
-0.013563501849568433 x 100 = -1.36%