23
A proportion is simply a number.
No, no number by itself can form a proportion. A proportion is a relationship between two numbers.
Eighteen is a noun, specifically a cardinal number.
A single number, such as 2760, cannot have a proportion.
no
one and one over eighteen.
That number quintillion.
1100 is a number, not a proportion. Furthermore, a proportion is independent of the measurement system.
Yes.
Yes, it is.
It could be undefined if you do not know the original number of which the "proportion" was meant to be out of.
The number is eighteen.