Those pesky varmints are back again ... percentages! But, unlike previous. years, they seem a lot easier to understand. Well, they will after you've watched this video! I take a look at how to increase and decrease by a percentage and how to find the percentage increase (or decrease) between two quantities. All in my quirky style and with lots of worked examples and CAS instructions to make sure you do well in every test and exam. You've tried the rest, now try me. Trust me. I've got your back.