Substract the following similar fractions fraction. Reduce the lowest term if necessary ( 1 - 2)

1. 15/ 22/ 12 / 22 =

a.3/22 b.5/22 c.4/22 d.27/22

2. 18/ 36/ 14/ 36 =

a.1/9 b.4/9 c.5/9 d.4/9