4 4/5. Check the linked photo for some explanation.
The whole-number factors of 23 are 1 and 23 .
Simply simplify the ratios/fractions into their simplest fraction form and divide the numerator by the denominator. If they are equal, they are in fact proportions, if not, they aren't
6 and 3 is your answer.
6 times 5 is 30
3 times 10 is 30
6+3= 9