### Home > CC2 > Chapter 5 > Lesson 5.1.1 > Problem5-13

5-13.

Simplify the following expressions.

1. $\frac { 2 } { 3 } + \frac { 4 } { 5 }$

Change both fractions to equivalent fractions with a common denominator.

$\frac{10}{15} + \frac{12}{15}$

$\frac{22}{15}$

1. $( \frac { 4 } { 5 } ) ( \frac { 2 } { 3 } )$

Multiply the numerators and denominators of both fractions.

$\frac{8}{15}$

1. $\frac{4}{5}-(-\frac{2}{3})$

Remember when you subtract a negative number, this has the same result as if you added it.

$\frac{4}{5} + \frac{2}{3}$