-2.58% is the change from 853 to 831
Calculation steps:
[( 831 - 853 ) ÷ 853] x 100 = -2.58%
Formula
Percentage change = [(831 - 853) / 853] x 100
Subtract the new number by the original number
831 - 853 = -22
-22 ÷ 853 = -0.02579132473622509
-0.02579132473622509 x 100 = -2.58%