We note that 2 of the squares are entirely colored. This then meant that the number corresponding to the squares is 2 (increased by some fraction represented by the third square.)
2+?

We note that 2 of the 10 equally-sized pieces in the third triangle are colored. This then means that the fraction represented by the third square is \(\displaystyle{\left(\frac{{2}}{{10}}\right)}\).

\(\displaystyle{2}+\frac{{2}}{{10}}={2}{\left(\frac{{2}}{{10}}\right)}\)

Thus the mixed number representing the squares is \(\displaystyle{2}{\left(\frac{{2}}{{10}}\right)}\)

Decimal

Next, we know that 2 tenths can also be written as 0.2 2+0.2=2.2

Thus the decimal representing the squares is 2.2

We note that 2 of the 10 equally-sized pieces in the third triangle are colored. This then means that the fraction represented by the third square is \(\displaystyle{\left(\frac{{2}}{{10}}\right)}\).

\(\displaystyle{2}+\frac{{2}}{{10}}={2}{\left(\frac{{2}}{{10}}\right)}\)

Thus the mixed number representing the squares is \(\displaystyle{2}{\left(\frac{{2}}{{10}}\right)}\)

Decimal

Next, we know that 2 tenths can also be written as 0.2 2+0.2=2.2

Thus the decimal representing the squares is 2.2