Answer:
We will need 5 1/3 lbs of hamburger
Explanation:
We can use ratio's to solve this problem. We will put breadcrumbs on top and hamburger on bottom.
1/4 c 1 1/3 c
--------- = -----------
1 lb x lbs
Using cross products
1/4 *x = 1 * 1 1/3
1/4x = 1 1/3
Multiply each side by 4
4 * 1/4 x = 4 * (1 1/3)
x = 4 * 1 1/3
We need to convert 1 1/3 to an improper fraction
1 1/3 = (3*1+1)/3 = 4/3
x = 4 * 4/3
x = 16/3
Now we need to convert it back to a mixed number
3 goes into 16 5 times with 1 left over
x = 5 1/3 lbs