3.38% is the change from 829 to 857
Calculation steps:
[( 857 - 829 ) ÷ 829] x 100 = 3.38%
Formula
Percentage change = [(857 - 829) / 829] x 100
Subtract the new number by the original number
857 - 829 = 28
28 ÷ 829 = 0.033775633293124246
0.033775633293124246 x 100 = 3.38%