assume that each circle shown below represents one unit. express the shaded amount as a single fraction and…

Explanation:

Step1: Count total parts and shaded parts

Each circle is divided into 10 parts. There are 4 circles in total, so there are 4×10 = 40 parts in all. The last - circle has 9 shaded parts and the first three circles are fully shaded (3×10 = 30 shaded parts), so there are 30 + 9=39 shaded parts.

Step2: Write as a single fraction

The single - fraction is $\frac{39}{40}$.

Step3: Write as a mixed number

Since 39÷10 = 3 remainder 9, the mixed number is $3\frac{9}{10}$.

Answer:

One Fraction: $\frac{39}{10}$ Mixed Number: $3\frac{9}{10}$