At the grocery store, a bag of chips contains 0.10 L of air…

At the grocery store, a bag of chips contains 0.10 L of air at 1.0 atm and 20 °C. The unopened bag of chips is taken on a camping trip in the mountains where the pressure is 0.90 atm and the temperature is 25 °C. What is the volume of air in the bag in the mountains?