To reduce the fat percentage you need to reduce your body weight.Normal value for fat percentage of body for males is 13 % and for females its around 20%.You can reduce the body fat percentage by having normal and healthy balanced diet.Eating lots of fruits and vegetables,have short and frequent meals,and try to avoid fried,junked and fatty foods by combining it with exercise.Exercises like Walking,Swimming, Jogging, Running, Skipping, etc will help to reduce fat and will also help to reduce the fat percentage.