Quick Answer
Coconut Flour does not use the same grams-to-cups value as every other ingredient. Using a practical US cup reference, 112 grams of coconut flour is about 1 cup.
That means 100 grams of coconut flour is about 0.89 cups, while 200 grams is about 1.79 cups.
Coconut flour is very absorbent and lighter than wheat flours. It is typically used in smaller quantities in recipes.