The area of a bathroom floor measures 2 yards by 3 yards and each custom tile that makes up the flooring is 1 1/2 square feet how many tiles are needed to cover the floor

2 × 3 = 6 thats your area in yards which you will have to convert to feet because the tiles are measured in feet
there are 3 feet in 1 yard so that means 6 yards times 3 is 18 then divide the area into the amount of the area of the tiles
 18 ÷ 1 1/2 which can also be written as 18 ÷ 3/2 
when you're dividing with a fraction you switch the division sign with a multiplication sign and flip the fraction so that it is written like this:
18 × 2/3 now multiply the numerator and 18 which equals 36
put that as the new numerator and now you have 36/3 which also means 36÷3 which equals 12 
12 is your answer i hope this helps