Question

tyra has 12 2/3 cups of sugar. if r is the amount of sugar needed for one batch of cookies, the expression 12 2/3 ÷ r can be used to find

Answer 1

She can make 19 batches of oatmeal.

Step-by-step explanation

First we can change the mixed number into an improper fraction:

`12(2)/(3)=12+(2)/(3)=(12\cdot3)/(3)+(2)/(3)=(36)/(3)+(2)/(3)=(38)/(3)`

In this problem, r = 2/3. The division is:

`12(2)/(3)/ r=(38)/(3)/(2)/(3)`

Using the KFC rule:

`(38)/(3)/(2)/(3)=(38)/(3)*(3)/(2)`

Solving we can see that the denominator of the first fraction can be simpliied with the numerator of the second fraction:

`(38)/(3)*(3)/(2)=(38)/(1)*(1)/(2)=(38)/(2)=19`

Tyra can make 19 batches of oatmeal with 12 2/3 cups of sugar.