Greg Byrd & Lynn Byrd 
Cambridge Lower Secondary Mathematics Learner’s Book 9 – eBook [EPUB ebook] 

Whether you’re learning about decimals, percentages and rounding or probability and ratio, this series helps you develop your mathematical thinking skills. You’ll be fully supported with worked examples and plenty of practice exercises while projects throughout the book provide opportunities for deeper investigation of mathematical ideas and concepts, such working out the most cost effective cinema membership. With key word boxes, clear diagrams and supporting illustrations, the course makes maths accessible for second language learners.