Here's how we arrive at that:

* Lead(II): This indicates that lead has a +2 charge (Pb²⁺).

* Permanganate: This is the polyatomic ion MnO₄⁻, which has a -1 charge.

To balance the charges, we need two permanganate ions (2 x -1 = -2) to equal the +2 charge of the lead ion.