---
title: "Percentage Calculator: Percent Of, What Percent | MCC"
description: "Find X percent of a number, what percent one number is of another, and the percent change. Free and private."
url: "https://mcc-solutionsnj.com/bookkeeping/percentage-calculator"
---

Free tool

# Percentage calculator

Three common percentage questions answered at once from two numbers.

[![Intuit ProAdvisor Gold tier badge](/img/credentials/intuit-proadvisor-gold.png)](https://proadvisor.intuit.com/app/accountant/search?searchId=matthew-coleman77)Gold tier in Intuit's ProAdvisor program. [See my Intuit listing](https://proadvisor.intuit.com/app/accountant/search?searchId=matthew-coleman77)

First number (X)

Second number (Y)

Prefer to talk it through? [Take the free books check](/bookkeeping/health-check) or [contact us](/contact).

Share

## Put this tool on your own site

Free to use. Paste this where you want it to appear. It runs in the visitor's browser, so nothing they enter is sent to us.

[See every calculator you can embed](/embed)

How it works

## How it works

**X% of Y = X / 100 x Y.** **X is what percent of Y = X / Y x 100.** **Percent change from X to Y = (Y - X) / X x 100.**

FAQ

## About this calculator

**How do I take a percent of a number?**

Divide the percent by 100 and multiply. 20% of 150 is 0.20 x 150 = 30.

**How do I find percent change?**

Subtract the old value from the new value, divide by the old value and multiply by 100.

**Why can percent change be over 100%?**

If the new value is more than double the old one, the increase is over 100%.

**Is anything saved?**

No. The math runs in your browser and nothing you enter is sent to us.

Related: [discount and percent change calculator](/bookkeeping/discount-and-percent-change-calculator), [sales tax calculator](/bookkeeping/sales-tax-calculator). See [all free tools](/free-tools). More free tools: [Inventory turnover and days of inventory calculator](/bookkeeping/inventory-turnover-and-days-of-inventory-calculator), [Profit margin and markup calculator](/bookkeeping/profit-margin-and-markup-calculator), [1099 deadline calculator](/bookkeeping/1099-deadline-calculator), or [see all free tools](/free-tools).

Free

### Month-End Close Checklist (PDF)

The five-day close, one page to print. Enter your email and we send a link to confirm it is yours, then the download. We may email you about new toolkits, and every email has an unsubscribe link.

General information, not tax or legal advice. [How we write and check our tools](/editorial-standards).

Do it yourself

### Break-Even and Pricing Workbook

Enter your fixed costs and what each product or service costs and sells for, then see the sales you need and the price that reaches your target margin.

[See what's inside ($24)](/toolkits/break-even-and-pricing-workbook) [Free sample](/toolkits/break-even-and-pricing-workbook#free-starter)14-day full refund

## Want your books and numbers handled?

[Free health check](/bookkeeping/health-check)[Call (908) 444-6373](tel:+19084446373)