what is 2.2222222222222222 rounded

Rouded to whole number :  2

              to tenths                 2.2

                  hundredths         2.22

                   thousandths          2.222       I think you can see the pattern here..

as a fraction   20/9

Depending on the problem, you could just say approx. 2.2 or approx. 2.3.