Posted by anonymous on .
If I had to convert 15 oz. to kg and it was given that 1 oz = 28.35 g and that 1 g = 1000 kg, how would I show my work to get the answer?

math 
Steve,
15 oz * 28.35g/oz * 1kg/1000g = 0.425 kg
note how the units cancel, just like common factors 
math 
anonymous,
okay, thanks! can you also look at this one for me? I'm having trouble getting the right answer.
4 kg to oz.
1 oz = 28.35 g
1g = 1000 kg
4kg x 28.35 g/ 1oz = 113.4 g
113. 4 g x 1 oz / 1000kg = 0.11 oz
The answer is supposed to be 141 oz 
math 
Steve,
gotta make the units cancel.
kg*g/oz makes no sense
kg * g/kg * oz/g = oz
4kg * 1000g/1kg * 1oz/28.35g = 141 oz 
math 
Steve,
what you are doing is multiplying by 1, which does not alter the value
1oz = 28.35g, so
1oz/28.35g = 1
28.35g/1oz = 1
which one you use determines which units cancel