The answer is already in its simplest form. You can not add the two because the have different variables. Hope this helps ;)))
Answer:
2 hrs, 24 min
Step-by-step explanation:
Sally: in one hour, she can paint 1/4 of the room.
Joe: in one our, he can paint 1/6 of the room
Hour one: 1/4+1/6=3/12+2/12=5/12
1÷5/12=1*12/5=12/5
12/5= 2 & 2/5 hours, or 2.4 hours, or 2 hrs 24 minutes
Sorry, idk I just need to answer 1 question to keep asking for more
3/20 is 15% so that's bigger