Question

Juan has 4 1/2 gallons of blue paint. Each wall in his house will need 3/4 of a gallon of paint. How many walls can Juan paint blue with the paint he has?

Answer 1

We know that

4 1/2 gallons-------> (4+2+1)/2-----> 9/2 gallons

1  wall in the house will need --------> 3/4 of a gallon of paint
 X wall-----------------------------------> 9/2 gallons
x=(9/2)/(3/4)----> 9*4/2*3-----> 36/6----> 6 walls

the answer is
6 walls