Percentage tricks

What is Percentage tricks?

Percentage tricks covers a specific, recurring money problem: doing quick percentage math without a spreadsheet. Instead of doing the math by hand or guessing, the tools on this page – Discount Calculator, and Percentage Calculator – give you an exact number in seconds, using the same formulas a financial professional would use.

Each tool listed here targets a different angle on percentage tricks. Start with whichever one matches your immediate question; the calculators are independent, so you can jump between them without losing any inputs, and every result updates instantly as you change a number.

Tools in this topic

• Discount Calculator – Calculate sale prices, stacked discounts, and savings on any purchase. Supports sequential markdowns, BOGO deals, fixed-dollar-off coupons, and percentage-off c
• Percentage Calculator – Calculate percentages, percentage change, increases, decreases, and discounts. Solve for any unknown in a percentage problem — X is what percent of Y, what is X

How to choose

• If you need a quick, one-off number, open the first tool above and enter your figures.
• If you’re comparing scenarios, open the tool in two browser tabs and change one variable at a time.
• If you want the full picture, check the Related Tools section on each calculator page for adjacent tools that cover the next step.