The unit centigram is rarely used. Engineers and scientists like to use powers of thousand (powers of ten in which the exponent is a multiple of 3), so either grams or milligrams would normally be used.
An object between about a millimeter and a centimeter in diameter can be expected to have a mass of more than a milligram, but less than a gram (it really depends on the shape and the density, though). Amounts of trace substances in food are sometimes expressed in milligrams, or even micrograms.
It is 75 centigrams.
400 centigrams (1 gram/100 centigrams) = 4 grams =======
642 centigrams is 0.00642 kilograms @100,000 centigrams per kilogram.
0.25 grams for 25 centigrams.
There are 15 grams in 1500 centigrams. 100 centigrams=1 gram