This post explains how to calculate Weighted Average in Excel with percentages. In a standard arithmetic average where the sum of values is divided by the number of values, each data value is treated ...

When selling goods, you may decide you need to mark up every item by a given percentage to cover costs and make a reasonable profit. Or, to put it another way, you're establishing a given ratio of ...

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 ...