By drawing the situation, we end up with the triangle below.We see that we need to use the trigonometric ratio
tan. We can set up the following:
tanΘ=

tanΘ=1.3529 (it's always best to round to 4 digits for accuracy)
To find the angle, we need to find the inverse of the function, which is tan^-1
=53.52 or in your case (rounded)
53.5:)