This activity reviews a wide variety of skills involving percentages. Student will begin by shading a portion on a 100% block and proceed through just under 20 questions which are broken into leveled categories. I assigned the kids to do a certain number of problems of their choice. That allowed the lesson to be differentiated to each student's skill level. Portion webs, percentage rulers, proportions, calculating tips, etc. are all covered here. Answer key is included.