Ideal Body Muscle Percentage Body Fat Vs BMI?

Body Fat vs BMI? - ideal body muscle percentage

Please explain

Percentage of body fat is to be read more accurately the risks to health, then the Body Mass Index ... But what about this theoretical situation.

A girl who has 32% body fat (from "overweight") and a BMI of 24.9 (on top of "healthy") If he 5'4 ", which is 145 pounds (47.85 pounds of fat)

And when she won the muscle in the body fat of 22% ( ") as" ideal for women, while the amount of fat. That would put the girl on more than 217 pounds. (BMI "overweight")

Is this really healthy?

Please enlighten me.