#### Answer

The improper fraction is $\frac{5}{4}$
The mixed number is 1$\frac{1}{4}$

#### Work Step by Step

One big triangle has 4 small triangles. The denominator is 4. There are 5 triangles shaded. The improper fraction is $\frac{5}{4}$
The mixed number is 1$\frac{1}{4}$