Give the numerical coefficient of the term -2x

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

How to do this , and can some one explain

The total number of dental clinics total for the last 12 months was recorded