Final answer:
To convert 315,500 milligrams to kilograms, you first convert milligrams to grams by dividing by 1,000, and then convert grams to kilograms by dividing by 1,000 again, resulting in 0.3155 kilograms.
Step-by-step explanation:
To convert milligrams to kilograms, you must know that there are 1,000 milligrams in a gram and 1,000 grams in a kilogram. Therefore, you multiply the number of milligrams by 1/1000 to convert milligrams to grams, and then multiply the result by 1/1000 again to convert grams to kilograms.
In this case, to convert 315,500 milligrams to kilograms, start by converting milligrams to grams:
315,500 mg × (1 g / 1,000 mg) = 315.5 g
Now convert grams to kilograms:
315.5 g × (1 kg / 1,000 g) = 0.3155 kg
Therefore, 315,500 milligrams is equal to 0.3155 kilograms.