Question

Maria bought 1 2/5 pounds of lunch meat for $3.36. How much would 2 3/4 pounds of lunch meat cost?

Answer 1

1 2/5 pounds ...................$3.36
2 3/4 pounds.....................?

2 3/4 * 3.36 / (1 2/5)
=11/4 * 3.36 / (7/5)
= 9.24 / (7/5)
= 9.24 / 1.4
= 6.6

answer: 2 3/4 pounds of lunch meat cost $6.60

Answer 2

$6.6

Explanation:

This is what we know:

`1(2)/(5) pounds = $3.36`

`2(3)/(4) pounds = $x`

You can say that they are proportional because there is a unit price for each pound.

`(1(2)/(5)pounds)/(3.36)=(2(3)/(4)pounds)/(x)`

There are a couple of ways to do this but I'll show you this one:

Ratio and proportion:

`((7)/(5)pounds)/(3.36dollars)=((11)/(4)pounds)/(xdollars)`

`((7)/(5))(x)=((11)/(4))(3.36)`

`(7x)/(5)=(36.96)/(4)`

`7x=((36.96)/(4))(5)`

`7x=((184.8)/(4)`

`7x=46.2`

`x=(46.2)/(7)`

`x=$6.6`