Which of the following is a good way to quickly determine whether 3/12 and 1/4 are equal

For this case we must indicate a form to determine if the following expressions are equal:

It is observed that if we multiply the numerator and denominator of the second fraction by "3" we obtain the first fraction:

Similarly, if we divide the numerator and denominator of the first fraction between "3" we obtain the second fraction.

ANswer:

Divide the numerator and denominator of the first fraction between "3"  or

Multiply the numerator and denominator of the second fraction by "3"

this cant be answered without the graph. you may need to add it.