Hey there!
Here is your answer:
The proper answer to this question is a " proper fraction".
Reason:
Mixed numbers are fractions with whole numbers like this: 5 6/7, also its not improper fraction because the top number is bigger than the bottom number like this: 8/3 proper fractions are regular fractions like this: 6/7!
Therefore the answer is proper fraction.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit