4% is the change from 824 to 857
Calculation steps:
[( 857 - 824 ) ÷ 824] x 100 = 4%
Formula
Percentage change = [(857 - 824) / 824] x 100
Subtract the new number by the original number
857 - 824 = 33
33 ÷ 824 = 0.04004854368932039
0.04004854368932039 x 100 = 4%