New Delhi, June 24 -- As New York City voters cast their ballots in the high-stakes Democratic mayoral primary on Tuesday (June 24), many will be using a system that changes how elections are decided: ranked choice voting (RCV).

Unlike traditional "pick-one" voting, RCV lets voters rank their favorite candidates in order of preference. The system is designed to give voters more voice and make elections more representative - but it's not without complexity or controversy.

Here's how it works - and why it matters in a crowded field that includes former Governor Andrew Cuomo, progressive State Assemblyman Zohran Mamdani, and several other prominent Democrats.

In New York City, voters can rank up to five candidates, from first to fifth cho...