Whether you can lose 15kg is uncertain, because the result of losing weight depends on many factors, such as lifestyle, eating habits, exercise intensity and duration. However, it is possible to lose weight if you insist on proper exercise and healthy diet every day, reduce calorie intake and increase exercise consumption.

Dancing Little Red Riding Hood and taking yoga classes in Duoyan Zheng are beneficial exercise methods, which can enhance the body's metabolic function and help to reduce fat and shape. However, aerobic exercise alone may not be enough to achieve the goal of losing weight, and attention should be paid to diet control.

I suggest you make a reasonable diet plan, control the total daily calorie intake, and ensure that the calorie intake matches the exercise consumption. In addition, pay attention to the quality of diet and choose healthy foods, such as vegetables, fruits, whole grains, lean meat and fish.

In short, it is possible to lose weight 15 kg in three months if you insist on proper exercise and diet control every day and maintain a healthy lifestyle. But everyone's physical condition and metabolic rate are different, and there is no guarantee that there will be the same result.