Rodney has a board 5/6 yd long. He used 1/5 of the board to make a frame. How long is the board used to make the frame.

He uses 1/5 OF 5/6 of a yard. That "of" is very important, because it indicates that, to find the answer, you multiply the two together.

That being said (1/5) times (5/6) = 5/30, which can be reduced to 1/6 yds to make the frame