You need more information. A fraction is the number or parts compared to the whole.
900g is simply just 900 grams. To get a fraction, you'd have to have another value to compare it too.
If you compare it to 1 kg which is 1000g, then you'd have 900 compared to 1000, or 9/10.
0.9kg = 900g
three thirds, four fourths
850g is smaller than 0.9kg (which is equal to 900g)
1 kg is heavier. 1kg is the same as 1,000 grams, which is clearly bigger than 900 grams.
7.5
2.7kg add 900g = 902.7
Don't know what frations are. In fractions, 356 could be written as 356/1 or 712/2 etc.
no
1 kg is bigger than 900g because 1 kg is equal to 1000g.
0.9kg = 900g
8kg
none
288
Yes there are, but they are ultrarare (I have a 950g).
900g flour.
7/5.
It is 9/10.