Please help! Due soon!

Answer:
a) 3/8
b) 3/10
Step-by-step explanation:
multiply the numerators and the denominators and then simplify.
a) is just 3*1 divided by 4*2, no simplification possible
b) is 4*21 divided by 7*40 is 84/280 and simplifies to 3/10 (divide by 28)