Use a Giant 1 to change each fraction so that they both have the same denominator.

Add them together as you would any fraction. Both fractions are negative so make sure your answer is, too.

$-\frac{7}{10}$

Multiply the $2$ by a Giant 1 so that it has the same denominator as the other term.

$-\frac{8}{3}$

Change both numbers into fractions greater than one, then multiply.

$\frac{10}{3}=3\frac{1}{3}$

See the help for part (c). Remember, dividing by a fraction is the same as multiplying by its reciprocal.