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 ...

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 ...

Percentage Formula: Percentages are a fundamental concept in maths, used frequently in daily life. It represents parts of a whole as fractions of 100. They're symbolised by the "%" symbol.

The percentage difference is usually calculated when you want to know the difference in percentage between two numbers. Microsoft Office Excel is a great tool to help you get started. In this post, we ...

APR considers up-front fees to reflect the true mortgage cost, not just interest rates. Calculating APR involves adjusting the loan amount by adding fees to find a new rate. Always compare APRs, not ...

Understanding the profit you can make selling products is the first step in analyzing the potential of the market for those products. Profit margin can be expressed as a dollar figure or as a ...

Microsoft Excel enables you to quickly find the percentage of two cells by using a formula and changing the cell format. This is especially useful if you have a spreadsheet full of sales data and want ...

Review budgets post-project to understand expense variances and improve forecasting. Calculate over-budget percentages by subtracting budgeted amounts from actual costs. Analyze specific items in your ...