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"Just a quick post- we started a unit on percents today.  Found this activity from Illuminations, but I needed it to be a little bit more.  The activity takes the BMIs and weights of season 14′s contestants and students need to find the percent lost for each in order to find out who won the game.  We then had a discussion on why the show does not award the prize to the person with the most weight lost, but the highest percentage." You could find some good video/media to go along with this to hook students - Maybe a before/after picture video which I'm sure you could find online. Have the students use the video to predict the winner then get into the worksheet. There are some pretty good extension activities embedded here as well: Research how BMI is calculated, Determine whether percentage of weight lost is the best method to determine the winner, etc.