How much body fat should a healthy person have?

Hmmn, so since the new scale does my body fat percentage as well as my weight here's what my amazing math skills have figured out.

If I punch my weight into my computer's calculator and then divide it by my body fat percentage and then hit the percent key that gives me the amount of pounds I have in actual fat.

(BTW, if anyone with better math skills than my own, as, I confess, math is not my friend -- feels this calculation is incorrect - please let me know).

Well, using my calculation - my body fat in pounds is 130 lbs.

However, I want to lose (from this point forward) 108 lbs which would leave me with only 22 lbs of fat (Approximately 14% fat).

That doesn't seem like enough body fat unless my breasts and ass completely disappear (which I do not see happening) so does that mean my current goal is unrealistic?

Or unhealthy?

Edited to add: so I googled my question and according to THIS WEBSITE
a woman between the ages of 31 - 40 should have a body fat percentage between 21 and 33 %.

However, THIS WEBSITE states:

The American Council on Exercise recommends the following percentages:

Essential fat

• Women 10-12%
• Men 2-4%

Total fat

• Athletes
  
  
  • Men 6-13%
  • Women 14-20%
• Non-athletes classed as fit
  
  
  • Men 14-17%%
  • Women 21-24
• Acceptable
  
  
  • Men 18-25%
  • Women 25-31%
• Overweight
  
  
  • Men 26-37%
  • Women 32-41%
• Obese
  
  
  • Men 38% or more
  • Women 42% or more

So if I still aim for 160, I'd need to retain 33.6 lbs of fat.

How do I do that? Unless I end up losing some muscle?

I am so confused right now.