what is 510,000,000 rounded to the nearest 10th or 10%

I'm not sure what you are asking.

510,000,000 = 51 * 10^8?

I hope this helps. If not, repost, clarifying your question.

To round 510,000,000 to the nearest 10th or 10%, we need to determine the nearest multiple of 10.

Step 1: Identify the place value you want to round to. In this case, it is the nearest 10th or 10%.

Step 2: Look at the digit right after the place value you are rounding to. In this case, it is the hundred millions place. The digit in this place is 0.

Step 3: If the digit in the next place is 5 or greater, add 1 to the digit in the place value you are rounding to. If it is less than 5, keep the digit in the place value you are rounding to the same.

Step 4: Replace all the digits after the place value you are rounding to with zeros.

In the given number, since the digit in the next place (thousands) is 0, we don't need to make any changes to the hundred millions place. Therefore, 510,000,000, rounded to the nearest 10th or 10%, remains as 510,000,000.