Question

You have a piece of wood that is 7 3/4 feet long.  You want to cut one piece that is 3 7/12 feet long and one piece that is 4 1/12 feet long.  Do  you have enough wood? Explain.

Answer 1

`7 (3)/(4) - (3 (7)/(12) + 4 (1)/(12) ) = 7 (3)/(4) - 7 (8)/(12) = 7 (9)/(12) - 7 (8)/(12) = (1)/(12)`

yeah , enough ...

Answer 2

`3\frac7{12}+4\frac1{12}=7\frac8{12}\\ \\ 7\frac34=7\frac9{12}\\\\ 7\frac8{12}<7\frac9{12}\\\\ Answer:I\ have\ enough\ wood.`