-29.59% is the change from 811 to 571
Calculation steps:
[( 571 - 811 ) ÷ 811] x 100 = -29.59%
Formula
Percentage change = [(571 - 811) / 811] x 100
Subtract the new number by the original number
571 - 811 = -240
-240 ÷ 811 = -0.2959309494451295
-0.2959309494451295 x 100 = -29.59%