What Angle Does the Polarizing Sheet's Axis Make with the Horizontal Direction?

[Kathi201]

Light known to be polarized in the horizontal direction is incident on a polarizing sheet. It is observed that only 15 percent of the intensity of the incident light is transmitted through the sheet. What angle does the transmission axis of the sheet make with the horizontal?

I am not quite sure how to figure out what the intensity of the light is. I know that I multiply that by .15 but I do not know how to figure out the value.

 

[Redbelly98]

See the formula for transmission I gave in the other post.