Maths? Don't Panic? is a friendly guide to mathematics for the UK Key Stage 3 Examination. The book has been written for students aged 11 to 15 (in school years 7 to 9), and the parents who want to help them. It is based on the Department of Education's Curriculum for 2014 onwards. It is not a formal textbook. Each chapter covers a single topic and provides explanations, tips, memory aids, worked examples and exercises. Mathematics doesn't have to be 'learned'. Once you understand the basic rules it's about knowing how to apply them to find the answer to the question. When you have understood a topic you will find that there is very little which needs to be memorized. It is just common sense. You don't need to work through the whole book. You can look-up any topic and find a straight forward explanation of the things which puzzle you. Exercises, with answers are set at the end of each chapter. A final chapter gives advice on how to pass examinations. The author has devoted many years to teaching individual students. In this book she makes use of the explanations she has found most helpful. She always hopes to get the response "Is that what it's all about." "I didn't know it was so easy." She aims to explain each topic in a way which makes it simple. Then her students feel confident that they really understand the subject This book, Volume 3, covers the basic concepts of Statistics and Probability, Ratio and Proportion, converting between Metric and British Units and the use of complex units such as speed and density. A final section gives advice to young people starting their first job. It included the basics of taxation and personal budgeting.