4.9% is the change from 817 to 857
Calculation steps:
[( 857 - 817 ) ÷ 817] x 100 = 4.9%
Formula
Percentage change = [(857 - 817) / 817] x 100
Subtract the new number by the original number
857 - 817 = 40
40 ÷ 817 = 0.04895960832313342
0.04895960832313342 x 100 = 4.9%