The welcome window lets you choose the type of exercise by clicking on one of the buttons. The buttons are labeled with the value to be deduced in the exercises. Here's a screenshot of the &kpercentage; welcome window Here's a screenshot of the &kpercentage; welcome window On the left hand the number of exercises can be selected. One can choose from 1 to 10 tasks. On the right hand you can change the level of difficulty: Easy Only percentages with easy to calculate values are given. Medium Harder percentages are included, even some with values greater than 100% Crazy Any percentage up to 200% may occur. All values are whole numbered however, so be honest, calculate them in your head! There are some help functions integrated. As usual some tool tips arise when the mouse is over a control element like a button or an edit line. If you click on the Help button, a little menu pops up with further opportunities: The Help popup menu. The Help popup menu. &help.menu.documentation;