1. **State the problem:** Calculate the result of the subtraction $25 - 16$. 2. **Recall the subtraction operation:** Subtraction means taking away the second number from the first number. 3. **Perform the subtraction:** $$25 - 16 = 9$$ 4. **Explain the result:** When you subtract 16 from 25, you are left with 9. **Final answer:** $9$