Percentages in Everyday Life

You will build a solid grip on what percentages mean and how to move fluidly between percent, decimal, and fraction forms. You will also master the three core percent problems—finding a part, finding a rate, and finding the whole—so later courses can focus on real-life application.

You will use percentages to make smart money decisions on real purchases: discounts, sales tax, tips, and markups. You will calculate each operation cleanly and then combine a discount with a tax in a single purchase, always working from the correct base at each step.

You will use percentages to make sense of savings, loans, and credit. You will calculate simple and compound interest on realistic amounts, interpret common rate statements, and see clearly why compounding behaves differently from simple interest over time.

You will read percentages the way they show up in real reports, polls, charts, and headlines. You will calculate percent changes, interpret shares of clearly defined groups, and learn to spot misleading claims, missing bases, and the difference between percentage points and percent change.