Hopes this helps:
You can just download this app that I use when I need help on a problem it it called Cymath.
25/4
You can multiply by crossing
10/24 and x/15
10*15 = 24x
150/24=x
Divide the numerator and denominator by 6
25/4
25/4 is the answer
What is the question u are asking?
Answer: h = -<em>is</em> divided by <em>2pr</em>