If 30 is decreased by 7, what is the result?

To determine the result of decreasing 30 by 7, you need to perform a simple subtraction operation. Starting with the number 30, you subtract 7 from it:

30 - 7 = 23.

Thus, the result of decreasing 30 by 7 is indeed 23. This confirms that the answer is accurate. When you subtract a smaller number (7) from a larger number (30), the outcome reflects the difference between the two values, which in this case is 23.