Fast-forward five years. You have been making your monthly
payments faithfully, and have paid down $13,000 of the mortgage debt,
so you owe $167,000. During the same time, the value of the house has
increased. Now it is worth $300,000. Your equity is $133,000: $300,000
(home's current appraised value) - $167,000 (amount owed) = $133,000 (equity)