Frequently Asked Questions
Percentages appear in virtually every quantitative field — from the 6.5% average U.S. sales tax rate (Tax Foundation, 'State and Local Sales Tax Rates,' 2024, https://taxfoundation.org/data/all/state/2024-sales-taxes/) to the 5.25% Federal Funds rate ceiling (Federal Reserve, 2024). Below are answers to the most common questions about how percentages work and how to use the PercentEase calculator.
Last updated: March 2026