Use our current data on Halloween spending in America to engage your students in an analysis of the ratios and percents of population, participation, and money spent in honor of October 31st. This activity takes kids through finding parts of wholes as well as ratio, percents and proportion problems. Beware: the tasks in this activity involve some large numbers as well as some challenging fraction/ratio/proportion problems.

# Tag: 5.NF

## Monster cake

First, students need to find the surface area that the M&Ms cover in order to approximate how many M&Ms she needs to finish her cake.

When Brian tried to make the cake, he mistakenly added too much peanut butter. Now all the of ingredients will need to be increased by some percent to insure that the cake maintains appropriate ingredient ratios?