Master Cylinder question.
Hang on a minute... it's the other way round!
If through the pedal leverage you have 700 lb of force to apply to the m/c piston, if it has 1 sq in there is 700 psi generated. OK so far.
But if you are applying 700 lb to a 2 sq in piston that is only 350 psi generated... pounds PER square inch! Looking the other way, 350 psi pushing against a 2 sq in piston = 700 lb force...
anyway the difference is proportional to the square of the piston diameters... 15/16 vs. 1-1/16 = 17/16: so relatively, (15/17)^2 = 0.78:1