$\"\"$

First factor the numerator and denominator.

25 = 5 · 5 \ \

40 = 2 · 2 · 2 · 5

The GCF is the product of the common prime factors in each term.

GCF = 5 \ \

$\"\"$

Divide the numerator and the denominator by GCF.

$\"\"$

$\"\"$ (Simplify)

$\"\"$

Simplifest form of the fraction $\"\"$ is $\"\"$ .