What comes after the sequence 1, 3/2, 2/1, 5/2? | Puzzle

Answer: 3/1

Explanation: Addition of 1/2 with the previous number. 1, 1+1/2=3/2, 3/2+1/2=2/1, 2/1+1/2=5/2, and lastly 5/2+1/2= 3/1 Correct answer: 3/1