Case File: How to Solve Multi-step Problems Involving Percent
TL;DR: Multi-step percent problems string two or more percent moves together — find a percent first, then add or subtract it, or apply a second percent to the new total. Think “tax on top of a discount” or “interest on top of interest.” The honest secret is to break it into one calculation at a […]
Treasure Hunt: How to Find Tax and Discount Using Percent of a Number
TL;DR: Two of the most useful percent skills you’ll ever use as a shopper: tax and discount. For tax, multiply the price by the tax rate as a decimal and add it to the original — so $50 at 8% tax becomes $50 plus ($50 times 0.08), which is $54. For a discount, multiply by […]
