Quick Answer
Salt (table salt) does not use the same grams-to-cups value as every other ingredient. Using a practical US cup reference, 273 grams of salt (table salt) is about 1 cup.
That means 100 grams of salt (table salt) is about 0.37 cups, while 200 grams is about 0.73 cups.
Table salt is a dense fine crystal. One US cup of table salt weighs approximately 273 grams, though coarse and sea salts vary.