-31.65% is the change from 850 to 581
Calculation steps:
[( 581 - 850 ) ÷ 850] x 100 = -31.65%
Formula
Percentage change = [(581 - 850) / 850] x 100
Subtract the new number by the original number
581 - 850 = -269
-269 ÷ 850 = -0.3164705882352941
-0.3164705882352941 x 100 = -31.65%