1.05% is the change from 857 to 866
Calculation steps:
[( 866 - 857 ) ÷ 857] x 100 = 1.05%
Formula
Percentage change = [(866 - 857) / 857] x 100
Subtract the new number by the original number
866 - 857 = 9
9 ÷ 857 = 0.010501750291715286
0.010501750291715286 x 100 = 1.05%