-1.61% is the change from 871 to 857
Calculation steps:
[( 857 - 871 ) ÷ 871] x 100 = -1.61%
Formula
Percentage change = [(857 - 871) / 871] x 100
Subtract the new number by the original number
857 - 871 = -14
-14 ÷ 871 = -0.016073478760045924
-0.016073478760045924 x 100 = -1.61%