### Home > CC2MN > Chapter 9 > Lesson 9.3.1 > Problem9-92

9-92.

Simplify each expression.

1. $-\frac{4}{5}+\frac{7}{12}$

Find a common denominator and simplify.

$\left(-\frac{4}{5}\right)\left(\frac{12}{12}\right)+\left(\frac{7}{12}\right)\left(\frac{5}{5}\right)$

$-\frac{13}{60}$

1. $\frac{5}{9}+\left(-\frac{1}{4}\right)$

Remember that adding a negative number is essentially subtraction.

$\frac{11}{36}$

1. $-\frac{3}{7}\cdot\frac{11}{12}$

Multiply the numerators together and the denominators together.

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

Turning the first fraction into a fraction greater than one may prove to be more helpful.