97.2k views
3 votes
Tyra has 12 cups of sugar. If r is the amount of sugar called for in one batch of cookies, the expression 12 , +r can be used to find how many batches Tyra can make with the sugar she has. If ris cup, how many batches of cookies can Tyra make? 3 Enter your answer in the box. batches

1 Answer

3 votes

19

1) Gathering the data

Tyra -----> 12 2/3 cups of sugar

r (amount of sugar) ------> 1 batch of cookies

12 2/3 ÷ r How many batches

r = 2/3 cups

2) Let's solve this problem by plugging into this expression 12 2/3 ÷ r the value of r

Let's turn this mixed number into an improper fraction, keeping the denominator and multiplying it by the whole number and then add to the numerator.


12(2)/(3)\text{ =}((3*12+2))/(3)=(38)/(3)

Now we can divide it:


\begin{gathered} (38)/(3) \\ ((38)/(3))/((2)/(3))=(38)/(3)*(3)/(2)=(38)/(2)=19 \end{gathered}

3) Hence, the number of batches Tyra can make is 19

User Shatu
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.