Percentage mental math practice9/25/2023 One trick that will often help you quickly calculate these types of percentages is to use the fact that x percent of y is the same as y percent of x. Why is that so helpful? Because it means that you can quickly calculate 10% of a number simply by moving its decimal point 1 position to the left.īut what about calculating something like 36% of 25? Or maybe 250% of 20? In these cases, our trick of using the power of 10% doesn’t help-so what can we do? How to Quickly Calculate Percentages In particular, it’s easy to calculate 10% of any number since that’s just 1/10 of the number. This turns out to be great news since it makes lots of percentages easy to calculate. And since “cent” here means 100 (as in “century”), we see that the word “percent” just means “per 100.” In other words, 10% means “10 per 100,” which is the same as the fraction 10/100 or 1/10. Let’s start with the most important question: What are percentages? Perhaps the most illuminating thing to know is that the opens in a new windowword “percent” is really just the phrase “per cent” squashed together. To make sure we’re all on the same page, let’s kick things off by taking a minute to recap a few key facts about percentages. See Also: opens in a new window3 Frequently Asked Questions About Percentages Recap: What Are Percentages? Which is exactly what we’re going to turn you into today. Why? Because once you’re caught up, you’ll be ready to step up and learn how to become a true percentage-calculating machine. If you’re not sure how to perform any of those handy calculations, or if you’re just in need of a general percentage refresher, I highly recommend taking a look at those earlier shows and getting yourself up to speed.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |