Question 860845
Marge's rate is 1 job/5 hours
Lisa's rate is 1 job/ 3 hours
Together their rate is 1/5+1/3
{{{1/5+1/3}}}
Find the least common denominator, which is 15
{{{3/15+5/15}}}
{{{8/15}}}
Together, it will take them {{{8/15}}} of an hour.