Here's why:
* Fractions represent parts of a whole. To express a pint as a fraction, you need to know the whole it's a part of.
* Pints can be part of different wholes. For example, a pint is:
* 1/8 of a gallon
* 1/2 of a quart
* 2/1 of a cup (or simply 2 cups)
To express a pint as a fraction, you need to specify the unit it's being compared to.
For example:
* A pint is 1/8 of a gallon.
* A pint is 1/2 of a quart.
* A pint is 2/1 of a cup.
