In the given sequence, the numerator is increasing by 2, and the denominator is twice the last number in the denominator. In the numerator, 1 +2 = 3, 3 + 2=5, 5 + 2 = 7. So, the next digit of the numerator = 7 + 2 = 9. In the denominator, 2 × 2 = 4, 4 ×2 = 8, 8 × 2 = 16. So, the next number in the denominator = 16 ×2 = 32. Hence, the next fraction of the series = 9/32.