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

`(31)/(70)\ lb`

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 =
`(1)/(2)+(1)/(7)`

=
`(7+2)/(14)`

=
`(9)/(14)\ lb`

Therefore they used
`(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 =
`(9)/(14)-(1)/(5)`

=
`(5* 9 - 14)/(70)`

=
`(45 - 14)/(70)`

=
`(31)/(70)\ lb`

Therefore they used
`(31)/(70)\ lb` flour to make the brownies.