how do you simplify 3/7 - 4/m

Question

lgbasallote · Answer

$$\huge \frac 3{7 - \frac 4m}$$
???

anonymous · Answer

|dw:1347061531315:dw|

anonymous · Answer

$$A. \frac{ 3m-28 }{ 7m }     B.  -\frac{ 1 }{ 7m}    C.  -\frac{ 25 }{7m}     D. -\frac{ 25 }{ 7}$$

anonymous · Answer

how do i simiplify it though?

anonymous · Answer

multiply not multiplay lol

anonymous · Answer

You must get a common denominator.. My sugestion multiplay the left side by m/m and the right side by 7/7 then you can just subtract the numerators

anonymous · Answer

Answer A is the answer to the question as reiterated by Abirla above.  We get it in the following manner$$\frac{3}{7}-\frac{4}{m}=\frac{3}{7}\frac{m}{m}-\frac{4}{m}\frac{7}{7}=\frac{3m}{7m}-\frac{28}{7m}=\frac{3m-28}{7m}$$

anonymous · Answer

The answer is (a). You need to find a common denominator. Multiply (3/7) by m/m which is essentially 1. Also multiply 4/m by 7/7. Now you can do the subtraction to get (a)

anonymous · Answer

As Chyme said just above, multiply each term by one in a form that will give a common denominator (in this case, 7m).

anonymous · Answer

exact what i was thinking' the denominator is 7m

hero · Answer

Ha, I like multiplay better than multiply