-0.93% is the change from 857 to 849
Calculation steps:
[( 849 - 857 ) ÷ 857] x 100 = -0.93%
Formula
Percentage change = [(849 - 857) / 857] x 100
Subtract the new number by the original number
849 - 857 = -8
-8 ÷ 857 = -0.009334889148191364
-0.009334889148191364 x 100 = -0.93%