10 grams fresh yeast = 5 grams traditional dried yeast = 3 grams fast acting easy yeast.
Traditional dried yeast is bigger granules and needs to be activated in water. This is what I mostly use. In UK made by Allinsons comes in tin, store in fridge. Never failed yet. Yeast pure and simple.
If I can get fresh then I do use that.
Fact acting easy yeast is in sachets of about 7 grams. Smaller grains and contains additives. Add straight to flour. I only use this in emergencies when no other in house.
Hope this helps.