Let's write this out to begin with:
[tex] \frac{15}{124} * \frac{230}{30} / \frac{230}{124} [/tex]
Knowing PEMDAS, we know to multiply first:
[tex]\frac{15 * 230}{124 * 30} / \frac{230}{124}[/tex]
[tex]\frac{3450}{3720} / \frac{230}{124}[/tex]
Now, remember that when you divide by a fraction, we must flip the fraction and multiply so instead of this:
[tex]\frac{3450}{3720} / \frac{230}{124}[/tex]
Our equation will look like this:
[tex]\frac{3450}{3720} * \frac{124}{230}[/tex]
[tex]\frac{427800}{855600}[/tex]
Which simplifies down to:
[tex]\frac{1}{2}[/tex]
