1.58% is the change from 821 to 834
Calculation steps:
[( 834 - 821 ) ÷ 821] x 100 = 1.58%
Formula
Percentage change = [(834 - 821) / 821] x 100
Subtract the new number by the original number
834 - 821 = 13
13 ÷ 821 = 0.015834348355663823
0.015834348355663823 x 100 = 1.58%