Algebra question

Question

An aur conditioning system can circulate 300 cubic feet of air per minute. How many cubic yards of air can it circulate per minute?

Answer 1

1 yard = 3 feet <--- cubes both sides

1 cubic yard = 27 cubic feet

300 cubic feet * 1 cubic yard / 27 cubic feet

= 300/27 cubic yards

= 100/9 cubic yards

= 11 1/9 cubic yards