A 500 gram piece of metal has a volume of 2.75 cm3. what is the density

The answer is: 181.8 g/cm^3 (rounded to the nearest tenth)

If you needed it rounded differently, the work is:

mass/volume = density

mass = 500 grams

volume = 2.75 cm^3

density = 181.818182 g/cm^3

Density is mass divided by volume so your answer is 181.818