Okay so im 15 about 170 pounds how can i lose weight fast!!!!? -

also how can i burn alot of calories and how many calories should i take in.

Go to fitday.com. Enter your info, and it will give you an approximate metabolic rate. Use the site to keep tabs on your caloric intake, and use it to keep track of calories burned. Just make sure you burn more than you take in, exercise regularly, eat healthy, and the weight will come off.