Read the passage and answer the question.

The magnetic susceptibility of a substance is defined as the measure of how readily it responds to an external magnetic field. It gives the measure of a substance's aptness to acquire magnetism. It has no units. Mathematically, it is defined as the ratio of the intensity of magnetization to the magnetic intensity. The susceptibility of a substance is given as (2.7 x 10^-5). 

What is the relative magnetic permeability of the substance?

1.000027

Relative permeability : μ_r = 1 + X

X = (2.7 x 10^-5)

μ_r = 1 + X = 1.000027