Here's why:
* Pronouns simplify language: Just like fractions simplify complex ratios, pronouns simplify the need to repeat nouns. Instead of saying "John went to the store. John bought milk. John came home," we can use "He went to the store. He bought milk. He came home."
* Both are used for representation: Fractions represent parts of a whole, while pronouns represent people or things. Both allow us to refer to something without directly naming it.
* Both have different forms: Just like fractions can be proper (1/2) or improper (5/4), pronouns have different forms depending on their function in a sentence (I, me, my, mine).
While the analogy isn't perfect, it captures the key similarity: both pronouns and fractions act as shorthand to represent more complex ideas in a concise way.