What is a Square Area Chart?
Learn how and when to use a square area chart instead of a pie chart to compare numbers of vastly different magnitudes.
Four Stats Formulas that Every Spreadsheet User Should Know About
Learn four easy excel formulas (average, median, mode, and standard deviation) that will save you from doing these calculations manually.
Calculate Percent Difference
Learn when and how to compare the difference between two equally important values.
Calculate Percent Error
Learn how to compare an estimate to an exact value by looking at different examples.
Calculate Percent Change
Learn the math behind how to find the percent increase or decrease by looking at different examples.