How does goblin lottery work?

Quote:

---

Originally Posted by Allfy

...
Also, putting in grade III materia seems to have an output ratio of about 10% to grade IV. In my experience it is 5% or less for IV > V.

---

In my experience its III > IV 2%

Haven't fed him enough IVs yet to have a concept.

The chance of obtaining a higher tier materia from transmuting a lower tier materia is low enough to have its own achievement and mini cutscene, if that's anything to go by.