“A petrified creature is transformed, along with any nonmagical object it is wearing or carrying, into a solid inanimate substance (usually stone). Its weight increases by a factor of ten, and it ceases aging” page 291 of the PHB. So yes your density does increase
“A petrified creature is transformed, along with any nonmagical object it is wearing or carrying, into a solid inanimate substance (usually stone). Its weight increases by a factor of ten, and it ceases aging” page 291 of the PHB. So yes your density does increase
Idk why OP assumes that the mass has to stay the same