-3.11% is the change from 899 to 871
Calculation steps:
[( 871 - 899 ) ÷ 899] x 100 = -3.11%
Formula
Percentage change = [(871 - 899) / 899] x 100
Subtract the new number by the original number
871 - 899 = -28
-28 ÷ 899 = -0.03114571746384872
-0.03114571746384872 x 100 = -3.11%