Zoe has a board 5 1/4 long. she cut off a piece. now the board is 3 5/6 feet long. how long was the piece she cut off

The piece Zoe cut off would be 1 and 5/12 ft long.

5 and 1/4 - 3 and 5/6

The least common denominator is 24.

5 and 6/24 - 3 and 20/24

5 and 6/24 becomes 4 and 30/24

4 and 30/24 - 3 and 20/24 = 1 and 10/24

1 and 10/24 can be simplified to 1 and 5/12.