Proportional Representation is generally used in multi-member constituencies. In this system, the number of candidates of a given political party to be elected depends upon the proportion of votes that it receives. For instance, if a political party receives 40% of the votes in a five-member constituency, then two of its candidates will be elected from that constituency. This system is not used in India. There is a sub-type of the proportional system which is known as the Single-Transferable Vote (STV) system. Here the voters have to rank the candidates in order of preferences. This system is used in elections to the Rajya Sabha and to the State Legislative Councils in India.
