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The Kumon Math Boosters series is designed to help children who either need to improve their basic math skills, or who are slightly ahead of the curve. Math Boosters: Problem Solving with Ratios & Proportions focuses on challenging topics your child must master to be ready for algebra and other advanced math concepts. This book provides practice using ratios and proportions in solving data-oriented problems your child will encounter in school-- especially in STEM subjects--and in everyday life. The final unit of the book introduces your child to basic concepts of statistics and probability.