Which is greater 0.8 kg or 800 grams

A gram is equivalent to 0.001 kilograms. 

You would want to convert into kilograms, for the easiest possible way. You have to multiply 800 by 0.001. Your answer would be 0.8 kg. 0.8 kg is equivalent to 0.8 kg, which means that neither answer is greater.

0.8 kg is equivalent to 800 grams.

D. i think it is the savings