The answer will depend on 450 WHAT! It should be obvious to anyone that the answer will be different for 450 grams or 450 ounces, or whatever.
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450% = 9/2
= 0.45 kilograms 450g as a fraction of a kilogram = 9/20 kilogram or simply 9/20kg
There are 1000 grams in a kilogram, and 100 centigrams in a gram. So, 450 kilograms * (1000 grams / kilogram) * (100 centigrams / gram) = 45,000,000 centigrams. So, 45 million centigrams in 450 kilograms.
450 / 528045 / 52815 / 176
4/20 = 1/5