Answer,
17lbs = 7.71107kg
Rounded it would be, 7.7 Kg
Explanation,
If you know that 1lbs to kg is, 0.453592 kg just multiply that by 17 lbs.
Then you will get, 7.71107 kg
If you would like a rounded answer, just round it & you will get 7.7 kg
Hope this helps :-)