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 […]
A Journey Through Math: How to Solve Word Problems Involving Percent Error
TL;DR: Estimated 100 students would show up, but actually 120 came — how off were you? That’s exactly what percent error tells you, as a percentage. Take the absolute value of estimated minus actual, divide by the absolute value of actual, then multiply by 100. The absolute value bars are important — they keep the […]
