No, don't worry. I am a teen and I weigh 8.9. As a teenager, you are still growing and are fine. Just don't go overboard with all the junk crap and eat healthy, always include some sort of fruit and veg in your meals, trust me. And always eat breakfast. You need it. It is extremely important and keeps you going throughout the day, don't worry. It's fine.
89 kg = 14st 0.2lb
23lbs is equivalent to 1.64 stones.
113 kg is equivalent to approximately 17.8 stones.
80.7 pounds is equal to 5.76 stones.
20 US stones is 250 pounds.
89 kgs
220 kg is equivalent to 34.6457 stones.
79.8 kg is approximately 12.59 stones.
94.5 kgs is approximately 14.9 stones.
35 kilograms is approximately 77 pounds and 5.5 stones.
89kg = 195.8lbs & 13.98 stone
71 kilograms = 11.18 stone.