Hello! First, we need to find a common denominator. Let's use 24 since 8 goes into 24 three times. Multiply 3 on both the numerator and denominator of 3/8 so the denominator will be 24. 3/8 will turn into 9/24. Now, we need to add 5/24. 9/24+5/24 is 14/24. 14/24 simplifies to 7/12. I hope this helps!