24.5% of what number is 15 ? do it in step by step format

SO, when a question says is it means equals. When it says of what it means multiply (usually).  So, the beginning equation of this would be...
24.5/100 (x) = 15              (< also instead of putting (24.5/100) you could put .245)
to get rid of the (24.5/100) on the left side we multiply both sides by the reciprocal. So
x = 15 (100/24.5)
x = 61.2244

Hope this helps!

The answer is d 18ft