A tube of premium insect repellent cream has a total mass of 0.085 kg0.085\text{ kg}0.085 kg and contains 14,500 mg14,500\text{ mg}14,500 mg of DEET (diethyltoluamide) as its active ingredient.
Consumer products of this type are mixtures designed with precise quantities of specific components to ensure the final product has the exact properties required. State the chemical term used to describe this type of mixture.
Calculate the percentage by mass of DEET in this tube of cream. Show your working and give your final answer to 3 significant figures.