34.5 is a decimal 34 1/2 is fractional
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To write 345 as a decimal, you place the decimal point after the last digit. So, 345 written as a decimal is 345.0. This is because the decimal point is always placed after the whole number part, even if there are no decimal digits.
345 = 34500%
0.345=345/1000 345*100/1000=345/10=34.5%
30 percent of 345 is 345 times 30 divided by 100 = 103,5.
345 rounded to the nearest tenth is 345. There is no change.