Answer:

A.  8.4/12

B. 1 2/3

Step-by-step explanation:

A. Get the LCM of 20 and 12. LCM = 60

42/60 = N / 12

N= 42/5

B. Simplify - 1 4/6

Get the GCF of 4 and 6

GCF = 2

(4/2) / (6/2) = 2/3

1 2/3