To calculate debt and investment, we need to understand the basic concepts of these financial terms. Debt refers to the money owed by an individual or organization to another party, while investment is the allocation of resources, usually money, in order to generate income or profit in the future. Let's take two examples to understand the working out of debt and investment. Example 1: Debt Calculation Suppose John takes a loan of $10,000 from his bank to start his small business. The loan has an annual interest rate of 5% and a repayment period of 5 years. We can calculate the debt as follows: 1. Calculate the interest amount for each year: Interest Amount = Principal Amount × Interest Rate Year 1: Interest Amount = $10,000 × 0.05 = $500 Year 2: Interest Amount = $10,000 × 0.05 = $500 Year 3: Interest Amount = $10,000 × 0.05 = $500 Year 4: Interest Amount = $10,000 × 0.05 = $500 Year 5: Interest Amount = $10,000 × 0.05 = $500 2. Calculate the total interest paid over the 5-year per...