Factors refer to whole numbers, not fractions.
4.0
3/5 9/15 447/745
yes any factor of nine can be divided by nine
no
70
If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
No it isn't.
It is 3
The factors of 9 are 1, 3 and 9. The proper factor of 9 is 3.
Nine is the highest common factor of 81 and 9
3 is the only proper factor of 9.
The prime factorization of nine is obtained by breaking it down into its prime factors. Nine can be expressed as (3 \times 3) or (3^2). Therefore, the only prime factor of nine is 3.