Percentage Calculator Guide

What is 18% GST on ₹4,500? How much did your rent increase year-on-year? Percentage math appears everywhere — shopping discounts, exam marks, business margins, and tax invoices in India. Pitara's free percentage calculator solves every common case with step-by-step explanations, right in your browser.

Why use a percentage calculator online?

Mental math errors on percentages cost money — especially when stacking discounts or reverse-calculating GST-inclusive prices. Browser tools avoid formula mistakes and show how the answer was derived. Pitara runs locally, so your business figures and exam scores never leave your device.

Whether you are a shopkeeper marking down stock for Diwali sale, a student checking board exam percentages, or a freelancer calculating project markup, one tool covers all modes.

Step-by-step: solve percentage problems

1. Open the Percentage Calculator.
2. Select a mode: X% of Y, what percent is X of Y, increase, decrease, or difference.
3. Enter your numbers in the fields.
4. Read the result with a short explanation of the calculation.

Modes explained with India examples

• X% of Y: Find 18% GST on ₹10,000 = ₹1,800. Or 33% marks out of 600 total.
• What percent: Scored 425 out of 500 — what percentage? Useful for CBSE and ICSE result sheets.
• Increase: Salary rose from ₹45,000 to ₹52,000 — percentage hike for appraisal letters.
• Decrease: Flipkart price dropped from MRP — verify the claimed discount.
• Difference: Compare two vendors' quotes as a percentage gap.

Tips for accurate percentage math

For GST, remember 18% on base is different from extracting 18% from an inclusive price — use our GST Calculator for add/remove GST specifically. When stacking discounts (10% + 5%), apply sequentially — not as 15% flat. For sale shopping, pair with the Discount Calculator to see final price and savings in rupees.

Related tools

Discount Calculator for sale prices, GST Calculator for Indian tax slabs, and Tip Calculator for restaurant bill splits — all free on Pitara.

Frequently asked questions

How do I calculate a percentage increase? Subtract the old value from the new value, divide by the old value and multiply by 100 — the calculator does this for you.

Can it show the steps? Yes, each mode displays a short explanation of how the result was derived.

Is GST the same as a simple percentage? Adding GST and removing GST from inclusive prices use different formulas — use the dedicated GST tool for invoices.

Are my numbers stored? No. Everything runs in your browser.