Forrester estimates that about 81% of all business use Excel. Excel is used for estimation, projection, day to day operations and pretty much anything you can imagine. Entire companies are run on Excel… it’s used in industries from finance to construction to education to medicine, relatively important stuff.
Here’s a fun statistic: Researchers have found that up to 90% of all spreadsheets have errors that affect their results.
Let that sink in for a sec.