# PercentEase — Full Content for LLM Ingestion > Last updated: 2026-03-21 > Site: https://percentease.com > Entity: Kymata Labs LLC > Contact: contact@percentease.com --- ## 1. Site Overview PercentEase is a free, client-side percentage calculator available at https://percentease.com in 20 languages. It solves three types of percentage problems: 1. **What is X% of Y?** — Result = (X / 100) × Y 2. **X is what % of Y?** — Result = (X / Y) × 100 3. **% Change from X to Y** — Result = ((Y − X) / |X|) × 100 Key features: - Instant results as you type - Zero data collection — all calculations happen in the browser - Mobile-responsive design - Copy-to-clipboard for results - 20-language support with RTL layout for Arabic - No sign-up required - Free, ad-supported --- ## 2. Pages | Page | URL | |------|-----| | Homepage (Calculator) | https://percentease.com/en/ | | About | https://percentease.com/en/about/ | | How It Works | https://percentease.com/en/how-it-works/ | | FAQ | https://percentease.com/en/faq/ | | Blog | https://percentease.com/en/blog/ | | Tools Directory | https://percentease.com/en/tools/ | | Contact | https://percentease.com/en/contact/ | | Privacy Policy | https://percentease.com/en/privacy/ | | Terms of Service | https://percentease.com/en/terms/ | | AI Access | https://percentease.com/en/ai/ | --- ## 3. Blog Posts (10 articles) ### 3.1 What is a Percentage? A Complete Guide - URL: https://percentease.com/en/blog/what-is-percentage/ - Published: 2026-01-15 · Updated: 2026-03-21 - Summary: Comprehensive guide covering what percentages are, their history, conversion methods, everyday applications, and common mistakes. ### 3.2 The Percentage Change Formula Explained - URL: https://percentease.com/en/blog/percentage-change-formula/ - Published: 2026-01-20 · Updated: 2026-03-21 - Summary: Step-by-step explanation of the percentage change formula with real-world examples, common errors, and applications in finance and economics. ### 3.3 Everyday Percentage Tips and Tricks - URL: https://percentease.com/en/blog/everyday-percentage-tips/ - Published: 2026-01-25 · Updated: 2026-03-21 - Summary: Practical mental math shortcuts for percentages in shopping, tipping, budgeting, cooking, and grade calculations. ### 3.4 How to Calculate Percentage Increase and Decrease - URL: https://percentease.com/en/blog/percentage-increase-decrease/ - Published: 2026-02-10 · Updated: 2026-03-21 - Summary: Formulas for percentage increase and decrease, common mistakes, successive changes, and real-world applications in inflation, retail, and fitness. ### 3.5 Percentage Calculator for Shopping — How to Calculate Discounts - URL: https://percentease.com/en/blog/percentage-discount-calculator/ - Published: 2026-02-15 · Updated: 2026-03-21 - Summary: Guide to calculating single and stacked discounts, BOGO deals, cashback rewards, and seasonal clearance math. ### 3.6 How to Calculate Tips Using Percentages - URL: https://percentease.com/en/blog/tip-calculator-percentages/ - Published: 2026-02-20 · Updated: 2026-03-21 - Summary: Standard tipping percentages (US and international), mental math methods, group dining tips, and the double-the-tax shortcut. ### 3.7 Understanding Interest Rates — Percentages in Finance - URL: https://percentease.com/en/blog/percentage-interest-rates-finance/ - Published: 2026-02-25 · Updated: 2026-03-21 - Summary: Simple and compound interest, APR vs APY, Rule of 72, credit card debt, mortgage comparison, and inflation's effect on savings. ### 3.8 How to Calculate Tax Percentages - URL: https://percentease.com/en/blog/tax-percentage-calculator/ - Published: 2026-03-01 · Updated: 2026-03-21 - Summary: Sales tax, income tax brackets (marginal vs effective), property tax, capital gains, payroll taxes, and VAT across countries. ### 3.9 Percentage in Statistics — Mean, Median, and Data Analysis - URL: https://percentease.com/en/blog/percentage-statistics-data/ - Published: 2026-03-05 · Updated: 2026-03-21 - Summary: How percentages function in surveys, growth rates, percentiles, medical research, weighted averages, and data visualization. ### 3.10 Converting Between Fractions, Decimals, and Percentages - URL: https://percentease.com/en/blog/fractions-decimals-percentages-conversion/ - Published: 2026-03-10 · Updated: 2026-03-21 - Summary: Conversion methods with formulas, a reference table of common values, repeating decimals, and practical applications. --- ## 4. Supported Languages (20) en, es, zh, de, fr, pt-BR, ja, ko, ar, hi, ru, id, tr, vi, th, it, nl, pl, sv, ms All pages and blog posts are available in every locale via /{locale}/ URL prefix. --- ## 5. Discovery & Machine-Readable Files | File | URL | Purpose | |------|-----|---------| | llms.txt | https://percentease.com/llms.txt | Condensed site summary | | llms-full.txt | https://percentease.com/llms-full.txt | Full content (this file) | | feed.json | https://percentease.com/feed.json | JSON Feed with blog entries | | ai.json | https://percentease.com/.well-known/ai.json | AI agent discovery | | agent-card.json | https://percentease.com/.well-known/agent-card.json | Agent capabilities | | ai-plugin.json | https://percentease.com/.well-known/ai-plugin.json | AI plugin manifest | | openapi.yaml | https://percentease.com/openapi.yaml | OpenAPI spec | | robots.txt | https://percentease.com/robots.txt | Crawler directives | | sitemap.xml | https://percentease.com/sitemap.xml | XML sitemap | --- ## 6. Related Tools by Kymata Labs | Tool | URL | Description | |------|-----|-------------| | CalcMyCompound | https://calcmycompound.com | Free compound interest calculator with growth visualization | | PercentEase | https://percentease.com | Free percentage calculator (this site) | | BMI Calc Now | https://bmicalcnow.com | Free BMI calculator with health category charts | | CalcMyPeptide | https://calcmypeptide.com | Free peptide reconstitution and dosage calculator | --- ## 7. Technical Details - Framework: Next.js (static export) - Calculations: Client-side JavaScript (IEEE 754) - Hosting: Vercel - Analytics: Google Analytics 4 - Ads: Google AdSense - i18n: next-intl with 20 locale files - No API endpoints — all calculations happen in the browser --- ## 8. Contact - Site email: contact@percentease.com - Parent company: Kymata Labs LLC - Parent email: contact@kymatalabs.com - Parent URL: https://kymatalabs.com --- ## 9. Crawling Policy AI crawlers, LLM agents, and search engines are welcome to access all publicly available content. See robots.txt for specific directives. We explicitly allow GPTBot, ClaudeBot, PerplexityBot, GoogleOther, Amazonbot, Bytespider, and all other well-behaved agents.