Question

Ramil amd carly decided to make more baked goods for the bake sale. They used 1/7 lb less flour to make bread than to make cookies. She used 1/5 lb more to make cookies than to make brownies. If she used 1/2 lb of flour to make the bread, how much flour did she use to make the brownies

Answer 1

Answer:

$\frac{31}{70}\ lb$

Step-by-step explanation:

Given:

They used 1/2 lb flour to make the bread.

They used 1/7 lb less flour to make bread than to make cookies

So they used flour to make the cookies = $\frac{1}{2}+\frac{1}{7}$

= $\frac{7+2}{14}$

= $\frac{9}{14}\ lb$

Therefore they used $\frac{9}{14}\ lb$ flour to make the cookies.

She used 1/5 lb more to make cookies than to make brownies.

So they used cookies to make the brownies = $\frac{9}{14}-\frac{1}{5}$

= $\frac{5\times 9 - 14}{70}$

= $\frac{45 - 14}{70}$

= $\frac{31}{70}\ lb$

Therefore they used $\frac{31}{70}\ lb$ flour to make the brownies.