Method for setting a gear ratio of a fan drive gear system of a gas turbine engine

A gas turbine engine (20) comprises a fan section (22) including a fan (36) rotatable about an axis and a speed reduction device in communication with the fan (36). The speed reduction device (45) includes a planetary fan drive gear system (50) with a planet gear ratio of at least 2.5. A fan blade tip speed of the fan (36) is less than 1400 fps.