16.78% is the change from 721 to 842
Calculation steps:
[( 842 - 721 ) ÷ 721] x 100 = 16.78%
Formula
Percentage change = [(842 - 721) / 721] x 100
Subtract the new number by the original number
842 - 721 = 121
121 ÷ 721 = 0.1678224687933426
0.1678224687933426 x 100 = 16.78%