Respuesta :

11, 13, 15 Rule: Add 2 or +2
1/6, 1/7, 1/8 Rule: Add
Adding by 2- 3,5,7,9,11,13,15 etc
Adding by 1 to denominator
1/2,1/3, 1/4 , 1/5 , 1/6, 1/7