1
four fifths must be added to make it whole
There are five fifths in one whole.
One-fifth and four-fifths makes a whole.
Each "whole one" is made of 5 fifths. Therefore 5 whole ones will contain 25 fifths.
5
There are: 5
Two fifths, this is because 5 fifths is the whole and if you already have 3 fifths you just need 2 more to make 5.
there are five fifths in one whole
5 fifths is one whole 5x 4 = 20 fifths = 4 wholes
One divided by one fifth equals five.
one fifth
5, hence the term "one fifth"