-29.72% is the change from 811 to 570
Calculation steps:
[( 570 - 811 ) ÷ 811] x 100 = -29.72%
Formula
Percentage change = [(570 - 811) / 811] x 100
Subtract the new number by the original number
570 - 811 = -241
-241 ÷ 811 = -0.2971639950678175
-0.2971639950678175 x 100 = -29.72%