1355 calories
7g fat (this is watermelon seed)
34 1 g carbohydrate
28 1 g sugar
The calories of watermelon are basically converted from sugar, and they are large carbohydrates, so you can eat less. If you want to eat, eat two small pieces, no problem.
To reduce fat, eat less watermelon, a high-calorie and high-sugar food. I suggest eating apples and celery.