On a normal calculator you can enter a mixed fraction by entering the front
for example
\(2\frac{2}{3}\)
can be entered on on your calculator by putting
\(2\rightarrow a\frac{b}{c}\rightarrow2\rightarrow a\frac{b}{c}\rightarrow3=2\frac{2}{3}\)
or you can convert it into an improper fraction and right
\(\frac{8}{3}\)
in this case since you want to add them together you can do
\(2\rightarrow a\frac{b}{c}\rightarrow2\rightarrow a\frac{b}{c}\rightarrow3+2\rightarrow a\frac{b}{c}\rightarrow2\rightarrow a\frac{b}{c}\rightarrow3=5\frac{1}{3}\)
or once again use the improper fraction form
\(\frac{8}{3}+\frac{8}{3}=\frac{16}{3}\)
which if you need a mixed fraction you can convert that into one by clicking shift ab/c or by clicking ab/c on some calculators or just doing math.