5 squirrels collected 575 acorns. If each squirrel needs 130 acorns to get through the winter, how many more acorns does each squirrel need to collect? Let's be accurate as possible.
Each squirrel now has 575 / 5 = 115 acorns. Each squirrel still needs to collect another 130 - 115 = 15 acorns.
The answer: 15.