2.39% is the change from 837 to 857
Calculation steps:
[( 857 - 837 ) ÷ 837] x 100 = 2.39%
Formula
Percentage change = [(857 - 837) / 837] x 100
Subtract the new number by the original number
857 - 837 = 20
20 ÷ 837 = 0.023894862604540025
0.023894862604540025 x 100 = 2.39%