human
There are enough provisions in a castle to feed 300 people for 90 days. After 30 days, 100 people leave the castle. How many more days are left until all the food runs out?
assistant
How many days are left after 30 days? ** After 30 days, there will be enough food left to sustain 300 people for 90 days – 30 days = 60 days.
How many people are left after 100 people leave? ** After the 100 people leave, there will be 300-100 = <<300-100=200>>200 people left.
How much food will the 200 people eat? ** The 200 people will eat 200/300 = 2/3 as much food as the original group of people in the castle.
How many more days will the food last? ** The 60 days' worth of food will last this smaller group for 60 days / (2/3) = <<60/(2/3)=90>>90 more days.
#### 90