Question

Does anyone know -6/7+6/21

Answer 1

Simple...

you have: $-\frac{6}{7} + \frac{6}{21}$

You must find a common denominator first-->>

$- \frac{6}{7} * \frac{3}{3} = -\frac{18}{21}$

Now...

$- \frac{18}{21} + \frac{6}{21} = -\frac{12}{21}$

$= -\frac{12}{21}$

Simplify it-->>$-\frac{4}{7}$

Thus, your answer.