Verified Answer :

dahamivherath

1 centigram= 10 milligram 

if you convert 25cg to mg, you'll get 250mg (25×10)
so 25 mg is lighter than 25cg(250mg)

so your answer is 25mg is lighter than 25cg. 
 

SmartCookie112

Well 

1 cg (centigram) is the same as 10 mg (milligrams) 

so

25 milligrams are lighter

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