When a number is divided by -3, the result is not more than 15. what is the number?

Let's call this number 'x'.

We need to set up an equation using x:

x/-3 = 15

Now we just need to rearrange the equation.

Multiply both sides by -3:

x = -45

The number is -45. We can check if this is right by dividing it by -3 and checking if it is 15:

-45 / -3 = 15

Therefore -45 is correct.