To round 98.59 to the nearest tenth:

• Look at the digit in the hundredths place (the second digit after the decimal point). In this case, it's 9.
• If this digit is 5 or greater, round the tenths place up by 1. If it's less than 5, leave the tenths place unchanged.
• Since the hundredths place is 9 (which is greater than 5), round the tenths place up from 5 to 6.

So, 98.59 rounded to the nearest tenth is 98.6.

Would you like more details or have any questions about rounding? Here are some related questions:

1. What is the difference between rounding to the nearest tenth and rounding to the nearest hundredth?
2. How do you round numbers to the nearest whole number?
3. What happens if the number in the hundredths place is 4 or lower?
4. Can you round negative numbers? How?
5. How do you round decimals when dealing with more than two decimal places?

Tip: Always check the digit in the place immediately after the one you want to round to—this will guide whether you round up or keep the current value.