I would say between 12-15% here. There are two types of fat, subcutaneous and visceral. Subcutaneous is fat that is stored under your skin, the kind that you can pinch. Visceral is fat that is stored around your organs. Obviously subcutaneous fat is the focus when considering aesthetics but visceral fat is much worse for you to have in terms of general health. I would say that you have a higher percentage of subcutaneous fat compared to visceral fat, which is a good thing. I say this because you have the beginnings of a V taper with what appears to be a thin waist and you are reasonably able to vacuum your abs. People with high levels of visceral fat tend to have a blockier shape and bulging gut. My estimation of your percentage is based on my personal experience, which I have a lot of. I used to have mandatory quarterly body fat tests for my sport for 9 straight years. Mechanisms of testing I underwent included high end calipers, "bod pod", and DEXA scans. It would be easier to estimate with an unflexed picture in the morning after you wake up. A good rule of thumb is if you can see the outer lines of each row of abs when you are standing flexed you are under 10%. Another good marker is if you have "penis skin" on your abs