Why is pro_rata a numeric type?

[thibauld]

Hi there,

I started digging in the open cap table format (and I love it) but, when reading about the pro_rata field in the ConvertibleIssuance class, I was surprised to see it defined as a Numeric type 🤔

src: https://github.com/Open-Cap-Table-Coalition/Open-Cap-Format-OCF/blob/main/docs/schema_markdown/schema/objects/transactions/issuance/ConvertibleIssuance.md

In the example above (from the repo), pro_rata: 2500 for a SAFE and... I am puzzled on how to interpret this 2500 and couldn't find the answer.
Could you tell me?
Thanks a lot!

[thibauld]

Continued the discussion here: #435