I will mark brainlist!!

Answer:
D. 5
Step-by-step explanation:
Dividing by a fraction is the same as multiplying by it's reciprocal
Answer:
5
Step-by-step explanation:
(keep it, change it, flip it) 4/1*5/1 = 20 or 4*5=20
so 4* 5 is the same as 4 divided by 1/5