15.83% is the change from 821 to 951
Calculation steps:
[( 951 - 821 ) ÷ 821] x 100 = 15.83%
Formula
Percentage change = [(951 - 821) / 821] x 100
Subtract the new number by the original number
951 - 821 = 130
130 ÷ 821 = 0.15834348355663824
0.15834348355663824 x 100 = 15.83%