peso and DR$

What is the relationship between the peso and DR$? IOW, how many pesos to a DR$?

Pesos from where?
The DR currency is Pesos

Don't understand your question at all. Like Eddy said, the currency in the Dominican Republic IS the Peso. There is 100 Dominican centavos in 1 Dominican Peso. (???)
Currently $16.70 Pesos = $1.00 U.S. Dollar (USD)

The symbol for a Dominican Peso in the Dominican Republic is "$". This is also the symbol for the US Dollar in the United States. To distinguish between the two, RD$ is used for Dominican Pesos (as opposed to DR$, which I've never seen), and US$ is used for US Dollars.

DOP is another common way of referring to the Dominican Peso.

RD$16.65 = US$1.00, or 16.65 Dominican Pesos to the US Dollar.