Answer:
20.2
Explanation:
This idea should be in your text book? And is this really a high school problem? Just wondering, because this was taught in middle school or earlier.
Do you know where the tenths place is? The "1" is in it, right?
What's the digit to the right of that? 7
Is that greater than or equal to 5? Yes, so you round up.
What do you round up? The 1 in the tenths place, so it becomes a 2.
20.2 is the answer.