Finding Pressure when given change in temperature

[Timmey19]

I have this problem: A 1.8L flask is filled with methane,CH4, at 863mmHg and 28C. if the flask is then heated to 164C what is the new pressure in atm?(assume ideal gas behaviour)

I know i need to use on of the gas laws but none of them seem to fit the picture.
thanks

 

[Timmey19]

Ive done some working
am i right in using P1V1/N1T1=P2V2/N2T2?

therefore P1/T1 = P2/T2
(using atm and K) 1.135526313/301 = P2/437
P2 = 1.6485 atm

 

[Borek]

Way too many significant digits, but otherwise OK.