How strong is the gravitational pull on the ISS at its operational altitude compared to the Earth's surface?

Answer

Roughly 90% as strong

The gravitational pull exerted on the ISS at 400 km is still substantial, being approximately 90% as strong as the gravity experienced on the Earth's surface.

How strong is the gravitational pull on the ISS at its operational altitude compared to the Earth's surface?
SpaceorbitISSaltitudeKármán line