Remember K H D | d c m. Kilograms is three places to the left of grams. So you have to move the decimal place three times to the left. So in this case the answer is 0.015 kilograms.
1500. A milligram is one thousandth of a gram so 1.5 grams = 1.5 g x [1000 mg/1g] = 1500 mg
1500 of course !
15 mg = 0.015 g
Ouuh - I know this one. 425 grams...