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? a

three eighths over three fifths = five eighths mile per hour

b

three eighths over three fifths = one and three fifths miles per hour

c

three fifths over three eights = one and three fifths miles per hour

d

three fifths over three eights = five eighths mile per hour