-95.07% is the change from 811 to 40
Calculation steps:
[( 40 - 811 ) ÷ 811] x 100 = -95.07%
Formula
Percentage change = [(40 - 811) / 811] x 100
Subtract the new number by the original number
40 - 811 = -771
-771 ÷ 811 = -0.9506781750924784
-0.9506781750924784 x 100 = -95.07%