Question

The boardman family walked 2/5 of a mile in 2/7 of an hour. What is their unit rate in miles per hour?

Answer 1

i think multiply or add 2/5 and 2/7.

Answer 2

Their unit rate is 1.4 miles per hour.

Explanation:

The family can walk
`(2)/(5)` miles in
`(2)/(7)` of an hour.

Thus, their unit rate in miles per hour can be calculated by:

`(2)/(5)` mile divided by
`(2)/(7)` hour

`(2)/(5)` ÷
`(2)/(7)`

`(2)/(5)` ×
`(7)/(2)`

=
`(14)/(10)`

=
`(7)/(5)`

This gives 7 miles in 5 hours.

To show the miles per hour,

1.4 miles in 1 hour.

So the family walked 1.4 miles in an hour.