Everyday Math for Everyday Life: A Handbook for When It Just Doesn't Add Up

For everyone who's ever said, "I'm no good with numbers," here's a practical, user-friendly field guide to the math you really need.

Your dinner bill came to $78.35, plus tip, divided amongst you and two friends. So how did you end up paying $50? In life, there are plenty of instances where a quick calculation would come in handy. Contrary to popular belief, the ability to calculate a tip, eyeball square area, or convert kilometers to miles—without using your fingers or moving your lips—is ...