Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

If you are using Microsoft Excel to manage numerical data, at some point you're inevitably going to display percentages. Doing so can give you a new insight, or make summarizing heaps of data a bit ...

Let's face it: Even the best budgets can't always predict your actual expenses. Things happen. Unexpected costs arise. That's life. That's why it's so useful to review your budget after a project is ...

Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. Long time math fans may remember our first foray into the world ...

Multiple factors affect the calculation of withholding by the percentage method, including an employee's marital status and the number of withholding exemptions the employee noted on his W-4 form.

Most companies sell their products on credit, for the convenience of the buyers and to increase their own sales volume. The term bad debt refers to outstanding debt that a company considers to be ...

Your income statement shows you how much money you received during the year and how much money you paid out in expenses during the year. Before you get to your net profit, you need to include your ...

The cost of investing has come down dramatically over time, as commissions have fallen so far that it's easy to buy and sell shares cheaply. Yet there are other trading costs beyond brokerage ...