Answer: 121/40
Explanation:
Expanding the 2⅜ to become 19/8 (as 8*2 = 16+3= 19)
Then, changing the denominators to be equal (smallest common denominator) which would be 40.
19/8 would have to be multiplied by 5 on the top and bottom to reach 40.
19/8* 5/5 = 95/40
Then, 13/20 has to have a denominator of 40 as well. Multiplying the top and bottom by 2:
13/20 * 2/2 = 26/40
95/40 + 26/40 = 121/40
121/40 is the most simplified version.