-33.42% is the change from 811 to 540
Calculation steps:
[( 540 - 811 ) ÷ 811] x 100 = -33.42%
Formula
Percentage change = [(540 - 811) / 811] x 100
Subtract the new number by the original number
540 - 811 = -271
-271 ÷ 811 = -0.33415536374845867
-0.33415536374845867 x 100 = -33.42%