2.21% is the change from 816 to 834
Calculation steps:
[( 834 - 816 ) ÷ 816] x 100 = 2.21%
Formula
Percentage change = [(834 - 816) / 816] x 100
Subtract the new number by the original number
834 - 816 = 18
18 ÷ 816 = 0.022058823529411766
0.022058823529411766 x 100 = 2.21%