Question

Yasmin went to the store and bought 3 and 1/2 pounds of ground beef for 11:20 how much do the ground beef cost per pound

Answer 1

Yasmin bought 3 1/2 pounds of ground beef, we can express the amount that she bought as a fraction like this:

`3(1)/(2)=(3*2+1)/(2)=(6+1)/(2)=(7)/(2)`

Since she bought it for $11.2, if we divide the cost by the amount that she purchased, we get the cost per pound, like this:

`(11.2)/((7)/(2))`

To divide by a fraction, we just have to invert its numerator and denominator:

`(11.2)/((7)/(2))=11.2*(2)/(7)=(22.4)/(7)=3.2`

Then, the cost per pound equals $3.2