Answer
$91.598^{\circ}$
Work Step by Step
$91^{\circ}35'54''=91^{\circ}+\frac{35}{60}^{\circ}+\frac{54}{3600}^{\circ}$
$=91^{\circ}+0.5833^{\circ}+0.015^{\circ}=91.598^{\circ}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.