to calculate this, we have to divide 2 1/2 by 8.
first, i wil turn 2 1/2 into fraction:
it's
[tex] \frac{2*2+1}{2} = \frac{5}{2} [/tex]
and if we divide this by 8, we multiply the denominator by 8:
[tex]\frac{5}{2*8}=\frac{5}{16} [/tex]
and this is the answer!