A weather balloon with a volume of 3.40774 L

is released from Earth’s surface at sea level.
What volume will the balloon occupy at an
altitude of 20.0 km, where the air pressure is
10 kPa?
Answer in units of L please give answer idk how to plug in the formulas

See the exact question previous to yours. I try not to give answers. The idea here is to teach YOU how to do them so you don't need help later. I have shown the other poster what to substitute the numbers. From here on in it's just math. And simple math at that. I shall be happy to check your answer if you post it. I can also help you through it if needed but you will need to be explicit about what is causing you trouble.