Question

how do i convert 51ft = into yd

Answer 1

Do you know how many feet are in a yard?

Answer 2

yes 3ft

Answer 3

Ok. So you can say:

\[51\text{ ft} \cdot \frac{1\text{ yd}}{3\text{ ft}}\]

Answer 4

The key here is that the feet in the second part are on the bottom, so that they cancel out the feet with the 51 and leave only yards.