Question

Not really sure how to do this with a negative number

Answer 1

Note that (-1/7) = -(1/7).

So you have

 1      -1         -1
--- * ------ = ------
 2       7        14

Answer 2

1/2*(-1/7) =  - (1*1)/(2*7)= - 1/14

(+)*(-) = (-)

Answer : - 1/14