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 ...

Calculate annual % change by dividing start by end value, raising to inverse years, minus one, times 100. Ex: a drop from $15M to $10M over 2 years is a 18.4% average annual decline. This calculation ...

CALCULATING percentage isn't always the easiest thing to do, but is a useful aide for anyone, especially if they can do so off the top of their head. Express.co.uk has compiled a handy guide on how to ...

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 ...

Calculate take-home pay by dividing actual paycheck amount by gross pay and multiplying by 100. Adjust calculations for salaried or hourly status to find correct gross pay per period. Consider bonuses ...

Calculating how far a number has declined from one year to the next is pretty easy if you are only considering a one year period. You subtract the current year's number from last year's number, then ...