I completely disagree with the strength training comment. You SHOULD absolutely be strength training. Show me one professional dancer who does not strength train.
I work with a professional dancer. And you better believe her body is svelt, cut and beautiful because of weights. Cardio is necessary too. But it's the combo of the two that creates a dynamic change in anyone's body.
Walking is great. But you should increase the intensity of it. Try jogging a bit. I am hesitant to say do this or do that because a dancers fitness program depends on her classes. You must be careful not to over train. This will not be a good thing for your body at all.
Basically, work in some strength training exercises and continue cardio. Another major segment to reducing body fat is nutrition. Here are 5 tips to fat loss for you to consider...
1) Eat 5-6 small meals throughout the day. Each meal should be 2-3 hours apart. Each meal should contain one protein and one carb. The first meal should be eaten within an hour after waking.
2) Drink lots of water
3) Rest properly. This means taking at least 24-48 hours between strength training the same muscles, and it also means getting at least 7-8 hours of sleep per night. Lastly, it means taking 1-2 days off from exercising per week.
4) Cardio. This should be done at different intensity levels and different session lengths. Consider doing a low intensity/long session, a high intensity/short session and a few medium intensity/medium length sessions.
5) Strength Training. Strength train each muscle 1-3 times per week. You should lift a proper weight and perform the proper amount of sets/reps for your strength training method.
All of the above things combined will result in fat loss. Good luck!