Replace `'square'` in each of the following by the correct number :
`2/3=square/15`

Options

A. `9`
B. `10`
C. `8`
D. `7`

Answer

To solve the equation \( \frac{2}{3} = \frac{\text{sqaure}}{15} \), we need to find the value that replaces 'square'.

### Step-by-Step Solution:

1. **Set up the equation**:
We start with the equation:
\[ \frac{2}{3} = \frac{\text{square}}{15} \]

2. **Cross-multiply**:
To eliminate the fractions, we can cross-multiply:
\[ 2 \times 15 = 3 \times \text{square} \]
This simplifies to:
\[ 30 = 3 \times \text{square} \]

3. **Solve for 'square'**:
Now, we need to isolate 'square'. We can do this by dividing both sides by 3:
\[ \text{square} = \frac{30}{3} \]
Simplifying this gives:
\[ \text{square} = 10 \]

4. **Final answer**:
Therefore, the value that replaces 'square' is:
\[ \text{square} = 10 \]