Question

Mr. Jones bought 2 and 1/7 lb. of salmon. He cooked 1/5 of it for lunch. How much salmon did he have left over?

Answer 1

`1(5)/(7)\text{ lb}`

Explanation:

First, convert
`2(1)/(7)\text{ lb}` to an improper fraction (to make the math easier):

`2(1)/(7)=(15)/(7)\text{ lb}`

Next, since the question asks about how much salmon is left over, find that fraction. After cooking one-fifth of the salmon, four-fifths remain:

`(5)/(5)-(1)/(5)=(4)/(5)`

Then, multiply the two:

`(15)/(7)*(4)/(5)=(60)/(35)\text{ lb}`

Finally, convert back to a mixed fraction:

`(60)/(35)\text{ lb}=1(25)/(35)\text{ lb}=1(5)/(7)\text{ lb}`