Question

Marneshia walked three over eight of a mile in three over five of an hour. What equation can be used to calculate her unit rate in miles per hour?

three eighths over three fifths = five eighths mile per hour
three eighths over three fifths = one and three fifths miles per hour
three fifths over three eights = one and three fifths miles per hour
three fifths over three eights = five eighths mile per hour

Answer 1

the answer is 3/8 over 3/5 = 5/8 miles per hour

Step-by-step explanation:

Answer 2

three eighths over three fifths = five eighths mile per hour which is the same as
`(3)/(8)`/
`(3)/(5)`=
`(5)/(8)`miles per hour

Step-by-step explanation:

You need to use the rule of three of maths.

1)
`(3)/(8)` miles in
`(3)/(5)` hours

It´s the same as
`(3)/(8)` miles----------------------
`(3)/(5)` hours in maths terms.

2) I need to know how much she wuold have walked in 1hour to calculate miles per hour. I apply the rule of three:

`(3)/(8)` miles----------------------
`(3)/(5)` hours

X miles----------------------1hour

I can calculte X by solving: 1hour *
`(3)/(8)` miles /
`(3)/(5)` hours =
`(5)/(8)`miles per hour which is the same as the first option

`(3)/(8)` miles /
`(3)/(5)` hours =
`(5)/(8)`miles

three eighths over three fifths = five eighths mile per hour