Are these division of fractions problems Show how by solving

Are these division of fractions problems? Show how by solving, or tell why not. Amanda needs 2/3 cups of flour for her brownie recipe. How much flour would she need to make 1/2 of the recipe? 2/3 of a cord of firewood fills 1/2 of a trailer. How many cords would it take to fill an entire trailer? A ranger clears a mountain trail. One day she clears 3/4 of a mile of the trail. This is 1/3 the length of the entire trail. How long is the entire trail? A ranger clears a mountain trail. So far, she has completed 3/4 of the trail, and this portion is 1/3 mile long. How long is the entire trail?

Solution

4.

a.To make half the recipe she needs 2/3 *1/2 = 1/3 cups of flour
Yes, its divisioon of fraction problem

b. To fill entire trailer you need (2/3)/(1/2) = 4/3 of a cord firewood. It\' a division of fractions

c.The entire mountain trail is (3/4)/(1/3) = 9/4 miles, is the length of entire trail
It\' a division of fractions

d. (1/3)/(3/4) = 4/9 is the total length of trial.It\' a division of fractions