2/3= /15 fill in the blank

To fill in the blank for the equation \( \frac{2}{3} = \frac{x}{15} \), you can solve for \( x \) by cross-multiplying:

\[ 2 \times 15 = 3 \times x \]

This simplifies to:

\[ 30 = 3x \]

Now, divide both sides by 3:

\[ x = \frac{30}{3} = 10 \]

So, the blank can be filled as follows:

\[ \frac{2}{3} = \frac{10}{15} \]

Thus, \( 10 \) is the value you need to fill in.