-1.05% is the change from 857 to 848
Calculation steps:
[( 848 - 857 ) ÷ 857] x 100 = -1.05%
Formula
Percentage change = [(848 - 857) / 857] x 100
Subtract the new number by the original number
848 - 857 = -9
-9 ÷ 857 = -0.010501750291715286
-0.010501750291715286 x 100 = -1.05%