Percentage Increase And Decrease Worksheet in a learning medium may be used to check pupils abilities and understanding by addressing questions. Since in the Student Worksheet about 90% of the articles of the complete book are issues, equally multiple selection and solution questions that are not available. While the rest consists of a quick summary of the topic matter. Applying worksheet, teachers no further need to bother to collect issues or questions. With the media the instructor is only needed to focus on giving a maximum understanding of the given subject. For the evaluation and check of studying outcomes, the teacher just wants to inform and primary the issues already available in the worksheet. Because more or less the worksheet functions as a guide for pupils in carrying out learning responsibilities both separately and in groups.