The percentages, discounts, dates, and quick figures that come up in ordinary life, explained without the jargon.
From tips to tax to test scores, the handful of percentage moves worth committing to memory.
Stacked deals, reverse math, and the traps that make a sale look better than it is.
A deadline in \"10 days\" can mean two very different dates. Here's how to avoid the mix-up.
Why a 50% rise and a 50% fall don't cancel out, and other percentage-change traps.