What is compression ratio in jet engine?

The compression ratio in a jet engine is the ratio of the pressure of the air exiting the engine's compressor to the pressure of the air entering the compressor. It is a critical factor in determining engine efficiency and performance, as a higher compression ratio typically leads to improved thrust and fuel efficiency. It is calculated by dividing the absolute exit pressure by the absolute inlet pressure. For modern turbojet and turbofan engines, compression ratiOS typically range from 10:1 to 40:1.