Final answer:
To find the remaining part of the board, subtract the length that was cut off from the total length of the board.
Step-by-step explanation:
To find the remaining part of the board, we need to subtract the length that was cut off from the total length of the board.
First, convert the lengths to a common denominator:
Total length of the board: 121/4 feet = 484/4 feet
Length cut off: 31/3 feet = 124/3 feet
Now, subtract the length cut off from the total length:
Remaining length of the board = (484/4) - (124/3) = 121/1 - 124/3 = (121*3 - 124*1)/3 = 363 - 124)/3 = 239/3 feet
The remaining part of the board is 239/3 feet.