16.71% is the change from 820 to 957
Calculation steps:
[( 957 - 820 ) ÷ 820] x 100 = 16.71%
Formula
Percentage change = [(957 - 820) / 820] x 100
Subtract the new number by the original number
957 - 820 = 137
137 ÷ 820 = 0.16707317073170733
0.16707317073170733 x 100 = 16.71%