Ebook: The Golden Rule of Mathematics

We compare car prices. We would like to exchange dollars into euros. We like to compare our electric bill with the square footage or square meters of our apartment or house. We would like to calculate the percent reduction of sales with their original sales price. The owner of a business would like to know whether he is profitable by comparing all his expenses with his sales. But most importantly we will show you a great shortcut that even a child can handle, fast and efficiently, in our changing reality. To help answer these kinds of questions, we use what we have termed The Golden Rule of Mathematics. Our hope and objective is to impart a practical knowledge to everybody who wants to master practically arithmetical problems on a daily basis and also save some money.