Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation:...

Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the following equation: 

CH4(g)+H2O(g)→CO(g)+3H2(g)

In a particular reaction, 25.5 L of methane gas (measured at a pressure of 734 torr and a temperature of 25 ∘C) is mixed with 22.2 L of water vapor (measured at a pressure of 702 torrand a temperature of 125 ∘C). The reaction produces 26.4 L of hydrogen gas measured at STP.

What is the percent yield of the reaction?