Break down the numerator and denominator into prime factors.
4/5
To write the fraction in its simplest form, we begin by trying to break down the numerator and denominator into prime factors.
12/15=2 * 2 * 3/3 * 5
Both numbers share the factor 3. Therefore, 3 is the greatest common factor (GCF) of the fraction. Reducing the numerator and denominator by the GCF gives us the fraction's simplest form.
