What is a Fraction?
A fraction is a number that is part of a whole.
Suppose you cut an apple pie into 8 slices. You and your friends eat 7 slices. The 1 slice that remains is a fraction of the whole pie: 1/8.
A fraction can refer to a certain part of a group of items. For example, one of your neighbors has 3 pets: 1 dog and 2 cats.
1/3 of the pets (group) are dogs.
2/3 of the pets (group) are cats.