1 atm of pressure corresponds to 760 mmHg. Therefore, we can set a simple proportion to find how many atmospheres of pressure correspond to 633 mmHg, in the following way:
[tex]1 atm : 760 mmHg = x : 633 mmHg[/tex]
And if we solve this proportion, we find the pressure in atmospheres:
[tex]x= \frac{1 atm \cdot 633 mmHg}{760 mmHg}=0.83 atm [/tex]
