Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the hundredths place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.
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To the nearest tenth, 77.5 To the nearest whole number, 78
19.6
25,133.336 rounded to the nearest tenth is 25,133.3
6.4 is already at the nearest tenth, and does not need further rounding.
When you are shopping or rounding decimals to the nearest price!