-32.9% is the change from 851 to 571
Calculation steps:
[( 571 - 851 ) ÷ 851] x 100 = -32.9%
Formula
Percentage change = [(571 - 851) / 851] x 100
Subtract the new number by the original number
571 - 851 = -280
-280 ÷ 851 = -0.3290246768507638
-0.3290246768507638 x 100 = -32.9%