Respuesta :

divide both by 4.
10/64, divide by 2
5/32
can't be reduced any further.
TSO
[tex]\frac{40}{256} = \frac{10\times 4}{64 \times 4} = \frac{10}{64} = \frac{2\times 5}{2\times 32} = \huge{\boxed{\frac{5}{32}}}[/tex]