Solve the Multiplication Equation: Finding the Factor in 15 × ? = 15

To solve this problem, we'll follow these steps:

• Step 1: Identify the equation given which is $15\times?=15$.
• Step 2: Apply the identity property of multiplication which tells us that any number multiplied by 1 is unchanged.
• Step 3: Conclude that the unknown number should be 1, since $15 \times 1 = 15$.

Now, let's work through each step:

Step 1: The given equation is $15\times?=15$.

Step 2: According to the identity property of multiplication, $a \times 1 = a$ for any number $a$. Here, $a$ is 15.

Step 3: Therefore, the number that fulfills the equation $15 \times ? = 15$ must be 1. When 15 is multiplied by 1, it stays 15.

Therefore, the solution to the problem is $1$.