Question

Margaret uses 1 3/4 teaspoon of vanilla to make 12 vanilla cupcakes. She wants to make 30 cupcakes. How much vanilla will Margaret use?

Answer 1

4 3/8
or
35/8
................

Answer 2

Answer:

$4\frac{3}{8}$ teaspoon vanilla

Step-by-step explanation:

Margaret uses $1\frac{3}{4}$ teaspoon of vanilla to make 12 vanilla cupcakes.

First we change mixed fraction to fraction

$1\frac{3}{4}\Rightarrow \dfrac{7}{4}$

For 12 cupcakes of vanilla = $\frac{7}{4}$ teaspoon vanilla

For 1 cupcakes of vanilla = $\frac{7}{4}\div 12=\frac{7}{48}$ teaspoon vanilla

For 30 cupcakes of vanilla = $\frac{7}{48}\times 30$ teaspoon vanilla

                                          = $\frac{35}{8}$  teaspoon vanilla

                                          = $4\frac{3}{8}$  teaspoon vanilla

Hence, Margaret uses  $4\frac{3}{8}$  teaspoon vanilla for 30 cupcakes