This is an activity to review ratios as well as converting between decimals, fractions and percent. I tend to use this activity around Halloween (skittles can be substituted for allergies) but non edible items such as pony beads could be used as well. This worksheet can be modified for different levels by controlling the total amount of M&Ms given (or used by) the students. For example having a total of 10 would create nicer looking fractions than a total of 17. If you have google classroom or something similar you can add student data to the spreadsheet and use it to create a chart.