How Accurate is Accurate Enough?

[Dave Britten]

There are plenty of finance problems where a result may need to be accurate to 12 or more digits. Having only 10 means you can't calculate in the range of billions of dollars with accuracy to the cent. And if you're doing various compound interest problems at those scales, you may need more than 12 digits in the intermediate calculations to arrive at a result that's accurate to at least 12.