She worked 4 days on the food drive because to do math with these two fractions, you have to give them the same denominator. So, 12 2/3 becomes 12 4/6. Then, how many times does 3 go into 12? 4 times so the answer is 4. Hope this helped :)
So, using the number 3,200,000 deaths per year, you want to divide it until it reaches deaths per minute. 3,200,000 divided by 365 (for days) 8767.123 divided by 24 (for hours) 365.297 divided by 60 (for minutes) and so you get 6.088 deaths per minute
