-31.73% is the change from 851 to 581
Calculation steps:
[( 581 - 851 ) ÷ 851] x 100 = -31.73%
Formula
Percentage change = [(581 - 851) / 851] x 100
Subtract the new number by the original number
581 - 851 = -270
-270 ÷ 851 = -0.3172737955346651
-0.3172737955346651 x 100 = -31.73%