Question 139272
John cleans one whole house in 8 hours, so he can clean {{{1/8}}} of a house in 1 hour.  Likewise, Julie can clean {{{1/6}}} of a house in 1 hour.


Together they can clean {{{1/8+1/6=3/24+4/24=7/24}}} of a house in 1 hour.  Therefore it would take them {{{24/7}}} or three and one-seventh hours to clean one whole house together.