[Machine Translation] I can't be persuasive in meetings, reports, and proposals... These problems can be solved at once. In this conversational style, a leading expert in business mathematics and education will teach you how to "make the most of numbers at work". For example, how to calculate "efficiency"? How to serve customers with high gross profit? What is the profit/loss deadline? Is that advertisement really effective? And so on. It is an enjoyable read and will be useful in your business from today.