How can 14.58 rounded to 14.00 be incorrect?

Answer 1

There is a method of rounding, called "floor" rounding, where 14.58 rounds to 14.00, but you're not going to win that argument. Under the most common system of rounding, when rounding to the nearest whole number, you look at the tenths place. If that digit is 5 or higher, you round up. 14.58 rounds to 15