To calculate Nathan's net worth, we need to determine his total liabilities (debt) and subtract that from his total assets. The debt ratio tells us that Nathan's liabilities are 80% of his total net worth.
Total liabilities = Car loan + Mortgage + Student loans = $2,000 + $150,000 + $15,000 = $167,000
Nathan's net worth = Total assets = Total liabilities / Debt ratio = $167,000 / 0.8 = $208,750
So, Nathan's net worth is $208,750.