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.

Your effective tax rate can be calculated using Microsoft Excel through a few standard functions and an accurate breakdown of your income by tax bracket. Most of the legwork involves looking up the ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Erika Rasure is globally-recognized as a leading consumer ...