A quantity is a value that represents the amount of something. It is the answer to the question of how much or how many. The quantity of something can be expressed in different units of measure. It does not necessarily have to be represented by a number. Consider the following example.

The quantity of the given rice can be expressed as a bowl of rice. It can be measured and calculated as $185$ grams. It can also be counted and said $6328$ grains.