Find out how many calories that you should be taking in and eat good carbs ( low glycemic ) and good protein. You will need to increase your protein as you increase your muscle so that your body uses the protein for that muscle. If you are not eating enough calories for your body and increased work load, your body will use that protein for fuel, robbing it from your muscles. This you do not want. Make sure that your cardio is intense, meaning, push yourself beyond your comfort zone and challenge yourself. This will help you to burn more calories. Again, you have to be aware of how many calories your body needs to sustain it and your cardio expenditure.
There are two ways to attack the fat %.
Energy Intake (Food and Beverages)
Energy Expenditure (Physical Activity and Exercise)
You would have to balance the intake and expenditure to create an weight constant. I do not understand why would care if you lost pounds? Weight or pounds is just a term of measurement. If you are concentrating on losing body fat and succussful with it why worry about the pounds?
Fuel the movement,