Question

can anyone help me i keep getting the answer wrong

Answer 1

$$
6\cfrac{1}{3} - 2\cfrac{7}{8}\\
\cfrac{19}{3}-\cfrac{23}{8}\\
=\cfrac{8\times 19}{24}+\cfrac{3\times 23}{24}
$$
Does this make sense?

You can simply this further

Answer 2

3 11/24?

Answer 3

Yes!
$$
6\cfrac{1}{3} - 2\cfrac{7}{8}\\
\cfrac{19}{3}-\cfrac{23}{8}\\
=\cfrac{8\times 19}{24}-\cfrac{3\times 23}{24}=\cfrac{152-69}{24}=\cfrac{83}{24}=3 \cfrac{11}{24}
$$