The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is:

In the Bohr model of the hydrogen atom:Potential Energy ($U$) $=-2\times$ Kinetic Energy ($K$)Total Energy ($E$) $=K+U=K-2K=-K$ The ratio of Kinetic Energy ($K$) to Total Energy ($E$) is:
$$\frac{K}{E}=\frac{K}{-K}=\frac{1}{-1}$$
Ratio = $1:-1$.