Question

one batch of cookies requires 1 3/4 cup of flour. if lena wants to make 2/3 of the recipe how much flour will she needD A. 3.2 B. 2 C. 1.75 D. 1.16

Answer 1

To solve the exercise it is easier if you first convert the mixed equation into improper, like this

`1(3)/(4)=(4\cdot1+3)/(4)=(4+3)/(4)=(7)/(4)`

Now, you just have to multiply the amount of flour that is required by the amount of recipe that Lena wants to prepare, like this

`1(3)/(4)\cdot(2)/(3)=(7)/(4)\cdot(2)/(3)=(7\cdot2)/(4\cdot3)=(14)/(12)`

Simplifying you have

`(14)/(12)=(2\cdot7)/(2\cdot6)=(7)/(6)=1.16`

Therefore, the amount of flour Lena will need is 1.16 cups flour, and the correct answer is D. 1.16.