Write the fraction in simplest form.

14. 18/48
15. 42/81
16. 32a / 8a squared
17. 15 b / 39b ( little 4)

14. Divide numerator and denominator by 2.

15. Divide numerator and denominator by 3.

16. Divide numerator and denominator by 8a.

Online "^" is used to indicate and exponent, e.g., x^2 = x squared.

17. Divide numerator and denominator by 3b.

I have no idea what you mean by "little 4."