Trash Lab and Google Sheets

Google Sheets can help us do math much more quickly if we know a few things. First you must start with an "=" sign to tell the computer you're doing math. Next sum( B3 : B ?? ) tells the computer to add up our first column from our first data in cell B3 to our last cell in B which is a different number for each class. " / " mean divide so =B33/total number of trash tallied will give us a decimal value that can be easily converted into a percent. Ctrl R tells the computer to fill a formula to the right, while Ctrl D tells the computer to fill it down. If you're confused, watch the video below.