To find out what percent 15 is of 25, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100 \]
In this case, the part is 15 and the whole is 25. Plugging in the values:
\[ \text{Percentage} = \left( \frac{15}{25} \right) \times 100 \]
First, calculate the fraction:
\[ \frac{15}{25} = 0.6 \]
Now, multiply by 100:
\[ 0.6 \times 100 = 60 \]
Thus, 15 is 60% of 25.
The final answer is:
60%