Q: What would I do if I wanted to remain at my current muscle mass but still lose fat?

A: That's what this site is all about! All the articles and answers I write are targeted at this exact goal: how to lose fat while preserving your muscle (or its close cousin: how to gain muscle without gaining fat). If you're significantly overweight, as long as you lose weight reasonably slowly and have a healthy diet and workout program you'll be able to lose many pounds of fat without losing much if any muscle. However as you get leaner, it becomes harder and harder to lose the remaining fat without also losing some muscle. The amount of muscle lost depends on many factors, some are in your control and some aren't. These include your genetics, age, health, the quality of your diet and exercise programs, the discipline with which you follow them, and the speed of your weight loss. Look around this site to find many articles and tips on how to optimize the fat loss.