Chapter 1 Understanding NumbersInterpreting and working with large and small numbers, ratios, proportions, and percentages are critical skills for new graduates. In this No Prep Math unit, high school students will review basic mathematical skills and apply those skills to more challenging real-world problems in the context of economic and social issues. Real-world contexts include population, population density, National Debt and Deficit, GDP, inflation and the CPI, misleading uses of percentag