Question

What is the sum of 1 by 13 and -2 by 9

Answer 1

Step-by-step explanation:

The sum of

$\frac{1}{13} + ( \frac{ - 2}{9} ) \\ = \frac{1}{13} - \frac{2}{9} = \frac{9 - 26}{117} = \frac{ - 17}{117}$