Question

Can decimals such as 0.23 and 0.9 be rational numbers?

Answer 1

Yes, `0.23` and `0.9` are rational numbers.

`0.23=23/100`

`0.9=9/10`

Explanation:

Since both `0.23` and `0.9` fulfills:

"In mathematics, a rational number is any number that can be expressed as the quotient or fraction `p/q` of two integers, a numerator p and a non-zero denominator q."

From source:
Rosen, Kenneth (2007). Discrete Mathematics and its Applications (6th ed.). New York, NY: McGraw-Hill. pp. 105, 158–160. ISBN 978-0-07-288008-3