What pair of fractions are proportional?
a. 0.4/0.1 =? 6/1.5
b. 0.4/0.1 =? 6/1.6
c. 0.4/0.1 =? 5.6/1.5
d. 0.4/0.1 =? 5.6/1.6
The two fractions in (a) are both equal to 4. The numerators and denominators are in the same proportion.
Saying that the fractions themselves are "proportional" makes no sense to me.