Question

how many cups would you need if you doubled the recipe?

Answer 1

We need to solve the following math problem,

$1\frac{3}{4}*2$

Step #1. Convert mixed numbers into improper fractions

$a\frac{b}{c}=\frac{a*c+b}{c}$$1\frac{3}{4}=\frac{1*4+3}{4}=\frac{7}{4}$

Step #2. multiply 7/4 * 2

$\frac{7}{4}*2=\frac{7}{4}*\frac{2}{1}=\frac{7*2}{4*1}=\frac{14}{4}$

Step #3. Simplify

$\frac{7*2}{2*2}=\frac{7}{2}$

Step #4. Convert back to mixed number

$\frac{7}{2}=3\quad\mathrm{Remainder}\quad\:1$

then,

$\begin{gathered} =quotient\frac{remainder}{divisor} \\ \\ \frac{7}{2}=3\frac{1}{2} \end{gathered}$

Answer: 3 1/2 or option b.