Answer:
8/12 and 9/12
Explanation:
The common denominator is the number that is a multiple of the denominators of both fractions.
Here, the two denominators are 3 and 4. Upon inspection, we can find that the common denominator is 3 * 4 = 12.
To change 2/3 into a fraction with denominator 12, we see that we have to multiply the numerator and denominator each by 4:
![(2)/(3) *(4)/(4) =(8)/(12)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/cino9wjlfw89rc87xsmvzfogsene29vmby.png)
Similarly to change 3/4 into a fraction with denominator 12, we see that we have to multiply the numerator and denominator each by 3:
![(3)/(4) *(3)/(3) =(9)/(12)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/xzv64k38iu103hxkm4bg9090bcrh2qo5i4.png)
Thus, the answer is: 8/12 and 9/12.
Hope this helps!