Answer:
I believe it would be "505 times n"
Step-by-step explanation:
If tis is not what you are looking for I am sorry, but the question was vague.
Rational, whole, integer, sorry I’m not sure what a natural number is though
So 90 is 4/5 of a number.
4/5n=90
4n=450
n=450/4
n=112.5