Which one is the nearest tenth for the number 45789.64?

Oh, dude, the nearest tenth for 45789.64 is 45789.6. It's like, you just look at the digit after the tenths place (the 4 in this case), and if it's 5 or more, you round up. But if it's less than 5, you just leave it as it is. Easy peasy, right?