# A restaurant uses 2 3/4 pounds of flour to make a batch of dinner rolls. About how many pounds of flour are needed if 3 batches of dinner rolls are to be made?

Mar 26, 2018

$8 \frac{1}{4}$

#### Explanation:

First method

$3 \times 2 = 6$

$3 \times \frac{3}{4} = \frac{9}{4}$

$\frac{9}{4} = 2 \frac{1}{4}$

$6 + 2 \frac{1}{4} = 8 \frac{1}{4}$

Second method

$2 \frac{3}{4} = \frac{2}{1} + \frac{3}{4} = \frac{8}{4} + \frac{3}{4} = \frac{11}{4}$

$3 \times \frac{11}{4} = \frac{33}{4}$

$\frac{33}{4} = 8 \frac{1}{4}$

Mar 26, 2018

$8 \frac{1}{4}$ pounds of flour.

#### Explanation:

If you do $2$ (the whole number) times $3 = 6$.

Leave that for now, make the $\frac{3}{4}$ in a percentage:

3/4 * 100% = 75%

Multiply this by $3$ and you get 225%. Make this percentage into a fraction:

(225%)/(100%) = 2.25= 2 1/4

$6 + 2 \frac{1}{4} = 8 \frac{1}{4}$