-2.56% is the change from 586 to 571
Calculation steps:
[( 571 - 586 ) ÷ 586] x 100 = -2.56%
Formula
Percentage change = [(571 - 586) / 586] x 100
Subtract the new number by the original number
571 - 586 = -15
-15 ÷ 586 = -0.025597269624573378
-0.025597269624573378 x 100 = -2.56%