Angle of incidence / angle of refraction practice problems

Light travels from water into fiber optic cable with an angle of incidence (θi) of 80.7 °. What is the angle of refraction (θr) if the refractive index of water is 1.33 and the refractive index of fiber optic cable is 1.6.

The angle of refraction is: ° (Give your answer to the nearest 10th of a degree)