I'm 18, i weight 152 lbs., and i'm 5''5. i play softball and i have a high metabolism and i'm trying to lose 20lbs in the next 3 months. what do i do?

Eat fewer calories: Helpful weight loss diets have natural foods that take time to chew but contain few calories. Examples include carrots, celery, and leafy lettuce (little or no salad dressing). When shopping for fruits, buy small ones no bigger than a tennis ball, because fruits have sugar. Drinks without calories include water and green tea. A calorie is a calorie but surely avoid sugar or simple starch calories.