Question

A volume (54.2 L) of gas at 1150 mmHg is subjected to a new pressure of 3450 mmHg, at constant temperature. What volume in liters (L) does the gas now occupy

Answer 1

Volume 1 = 54.2 L
Pressure 1 = 1150 mmHg

Volume 2 = ?
Pressure 2 = 3450 mmHg

54.2 L * (1150/3450) = 18 L

1150/3450 because volume should get smaller since pressure is increasing

Answer 2

OK BUT why did you throw away a digit. You have three places in 54.2 but only two in the answer.