What is the difference between a right and a duty?

Both rights and duties are essential in today's society, but there is a distinction between the two.The idea of a duty is what a citizen should do to demonstrate their active participation in society, this can be seen through voting, or paying tax, these are often obligatory (tax), or encouraged heavily (voting). This is different to a right, where voting may be considered a right, it is not obligatory and is seen as a non essential duty by some- voting is a right.