-31.84% is the change from 851 to 580
Calculation steps:
[( 580 - 851 ) ÷ 851] x 100 = -31.84%
Formula
Percentage change = [(580 - 851) / 851] x 100
Subtract the new number by the original number
580 - 851 = -271
-271 ÷ 851 = -0.318448883666275
-0.318448883666275 x 100 = -31.84%