Answer :

Louli
Answer:
[tex] \frac{1}{4} [/tex]

Explanation:
A fraction in the simplest form is a fraction in which there are no common divisors between the numerator and the denominator.

The given fraction is 
[tex] \frac{25}{100} [/tex]

We can note that both the numerator and the denominator can be divided by 5. Doing this, we will get:
[tex] \frac{5}{20} [/tex]

Again, we can note that both the numerator and the denominator can again be divided by 5.
This will give us:
[tex] \frac{1}{4} [/tex]

The reached fraction 
[tex] \frac{1}{4} [/tex] has no common divisors between the numerator and the denominator. Therefore, it is in the simplest form.

Hope this helps :)