Respuesta :

13/25,

any time you see a prime number in the numerator, its in its simplest form.

For this case we have the following fractions:

22/33 42/81 13/25 18/27

Fraction 1: You can divide the numerator and denominator by 11

[tex]\frac{22}{33}= \frac{2}{3}\\[/tex]

Fraction 2: The numerator and denominator can be divided by 3

[tex]\frac{42}{81}= \frac{14}{27}\\[/tex]

Fraction 3: The numerator and denominator can not be divided by the same number.

[tex]\frac{13}{25}\\[/tex]

Fraction 4: The numerator and denominator can be divided by 9

[tex]\frac{18}{27}= \frac{2}{3}\\[/tex]

Answer:  

A fraction that is written in its simplest form is

Fraction 3: [tex]\frac{13}{25}\\[/tex]