Answer:
each
What is a fraction?
A fraction is a fragment of a whole number, used to define parts of a whole. The whole can be a whole object, or many different objects. The number at the top of the line is called the numerator, whereas the bottom is called the denominator.
A way to solve this is to simply multiply the denominator (4) by 5.
4 × 5 = 20
Now, add the new denominator to the fraction:

Therefore, each student will get
of the cake if they split it evenly.