Two hundred grams is almost exactly one cup of granulated sugar using the 198 gram reference. It is about 1.67 cups of all-purpose flour and 0.88 cups of butter. Treating 200 grams as one cup works for sugar, but not for every ingredient.
When the decimal is close to a whole or common fractional cup, the table shows the practical relationship. Do not force every result to the nearest half cup if the recipe is sensitive to proportion.
This amount is common in sponge cakes, cookie recipes, butter blocks and ingredient packages. If the original recipe is written in grams, using a scale avoids losing precision during conversion.