Is it “more than 100 people” or “over 100 people”? In most cases, both are correct. Here is how to choose.
More than is used to talk about quantity or amounts: numbers, time, money, or size.
When there is no number after it, only more than works.
Over can also mean “more than” before a number. It is also used for position or movement (above or across something). Here, more than is not possible.
Style note: in formal writing, some people still prefer “more than” with numbers, but in everyday English “over” is completely fine.
With a number, both are fine.
Without a number (more than we expected), use “more than”.
For position or movement (above or across), use “over”.
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