Level 4 · Mathematics M4.2
Percentages, proportion and growth
Use percentages to find changes, and see how amounts grow or shrink over time.
Increase and decrease an amount with a multiplier, find a percentage change, and work back to the original amount. Compare simple and compound interest, model growth and decay, combine ratios, and write and graph direct and inverse proportion.
7 chapters. Your place is kept on this device only.
You are ready for this book if
You can find 15% of 80 without a calculator.
- This book M4.2 Percentages, proportion and growth
- One step down M3.4 Ratio and proportion
Contents
Keep it, print it, pass it on
- One file for any phone
743 KB. Opens with no internet. Share it with anyone. - PDF to print
697 KB, 80 A4 pages. Answers at the back. Copies well in black and white. - EPUB for reading apps
125 KB. For e-readers and book apps.
For parents and teachers
For learners who can find a percentage of an amount, share in a ratio and use a letter for a number. In many schools this fits teenagers of about 14 to 16, and adults who want to refresh percentages, ratio and proportion can start here too. Each chapter takes one or two sessions. A learner can work alone: every exercise has its answer and the reason for it.
Strand: Fractions and ratio. Written and drawn by attnom. Free to read, print and share.