If the product of two positive fractions a and b is 15/56' find three pairs of possible values for a and b.

all you have to do is find pairs of factor for both 15 and 56

e.g. 1,15   3,5  

     1.56    2, 28   4, 14

so three possibilities could be

1/1 x 15/56

3/4 x 5/14  

1/2 x 15/28

x:       y:  

-1         4

0         4

1         6

2         18

3         20