You need to carpet a new office room. the new room is 12 feet by 15 feet 6 inches. a supplier delivered 20 square yards of carpet tiles. do you have enough tiles to do the job? how much more or less do you need?

First, determine the area of the floor of the new room by multiplying the dimensions in feet. 
                                      Area = (12 ft)(15.5 ft) = 186 ft²
Then, we convert the calculated area to yards
                              (186 ft²)(1 yd/ 3 ft)² = 20.67 yd²
Given that the supplier only delivered 20 yd², approximately 0.67 yd² of your floor will not have carpet.