Ok, this is a dumb question. Apologies in advance. When writing numbers in fiction which is correct? 100 or one hundred? I swear I knew this years ago, but my brain can't locate the info.
I generally spell them out. Often a number can be said more than one way, and I need to make sure the reader reads it right. For example, I say 2016 as "twenty sixteen" if I'm talking about the year, but I'd say it as "two thousand and sixteen" if I'm talking about the number of pennies in my jar.
Don't feel bad I had the same question about a month ago. https://www.writingforums.org/threads/one-or-1-opinions-please.144555/