How do you write a fraction in simplest form?

You look for common factors between the numerator and denominator, and divide both by the factor. For example, in the fraction 6/12, both numerator and denominator are divisible by 2, so you simply this to 3/6. Since both are divisible by 3, this can be further simplified to 1/2. Or, you divide numerator and denominator in the original fraction by 6 in the first place.