to many factors to really estimate, but if everything is good and you leave them with the parents you could be looking at up to 80% max.
The fungus only applies to the eggs and not the "wigglers" (tadpoles). You don't have to worry about fungus anymore.
And in the future I wouldn't bother adding anything to the water with the eggs, the fanning action of the mother as well as her picking off the moldy eggs will do the job for you. Adding methylene blue or other chemicals is mainly when you seperate the eggs into another tank. Methylene blue will actually kill most if not all your beneficial bacteria, so never a good thing to add to your main tank.
The fungus only applies to the eggs and not the "wigglers" (tadpoles). You don't have to worry about fungus anymore.
And in the future I wouldn't bother adding anything to the water with the eggs, the fanning action of the mother as well as her picking off the moldy eggs will do the job for you. Adding methylene blue or other chemicals is mainly when you seperate the eggs into another tank. Methylene blue will actually kill most if not all your beneficial bacteria, so never a good thing to add to your main tank.