2.68% is the change from 820 to 842
Calculation steps:
[( 842 - 820 ) ÷ 820] x 100 = 2.68%
Formula
Percentage change = [(842 - 820) / 820] x 100
Subtract the new number by the original number
842 - 820 = 22
22 ÷ 820 = 0.026829268292682926
0.026829268292682926 x 100 = 2.68%