A wooden crate weighing 2 5/16 pounds contains grapefruit weighing 24 1/2 pounds. What is the combined weight of the crate and the grapefruit?

This isn't an English Question but ...

What you do first is find the LCD (Least Common Denominator)

You do this by finding the factors of 16 and seeing if they correspond with two.

So you're factors are, (1,16) (2,8) (4,4)

So the LCD is 2. You would then make each fraction over two. Since 1/2 is already over 2 you would make 5/16 over two by dividing by 8.

That gives you. 347 or 347/1000

Then you would add each whole number, 24 + 2. This gives you 26 and then add the decimel. 26.347

There is probably a simpler way but here's mine.