As a greatest common factor, we have to have a fraction whose numerator divides 3 and 9 and whose denominator divides 4 and 20.....the only thing that works is 3/4...so we have
As a greatest common factor, we have to have a fraction whose numerator divides 3 and 9 and whose denominator divides 4 and 20.....the only thing that works is 3/4...so we have
