# What is -8 1/2 + 3 3/5 as a proper fraction?

Nov 20, 2016

$- 4 \frac{9}{10}$

#### Explanation:

First, turn your proper fractions into improper fractions.

$- 8 \frac{1}{2} + 3 \frac{3}{5}$

$- \frac{17}{2} + \frac{18}{5}$

You need to create a common denominator so that you can add the numerators. Multiply the left by 5 and the right by 2.

$- \frac{85}{10} + \frac{36}{10}$

$\frac{- 85 + 36}{10}$

$- \frac{49}{10}$

Convert that back to a proper fraction.

$- 4 \frac{9}{10}$