This can be written: y=8/3 when x=1/4; find y when x=9/8.
Direct proportionality is assumed. Apply the change in x to the change in y. (9/8)/(1/4)=y/(8/3), so y=8/3*9*4/8=12. Therefore, y=12 when x=9/8.
Another way: y=kx where k is constant of proportionality. 8/3=k/4, so k=32/3. So y=32x/3=32*9/(3*8)=12.