Hey Lori,
This is what George Synder says in his freestyle methods book that I have:
Muscle factors or the amount of protein/lb of body weight women need on a daily basis, range from .5-1.0. More you exercise and the greater the change you want to see, the higher the protein requirement. Here is a sampling of common muscle factors:
.5grams - Slenderize and develop muscle tone with minimal planned activity.
.8grams - Replace body fat with some lean muscle. Moderate weight training and cardivascular exercise 3-6x per week for 45 minutes/day.
1.0grams - Fitness competitiors can lose fat, build muscle, and get in the best shape ever with intense weight training and cardiovascular exercise for 1-2 hours nearly every day.
Hope this helps!