999 has two adjacent integer hundredths. 900 and 1000, the difference between 999 and 900 is 99,900, and the difference between 1000 is only 1, so the integer percentage closest to 999 is 1000.

Whole hundred:

Integers are tens and zeros of single digits, such as 100, 200, 300, 400, etc. Reserved number is a number calculated in the form of integer in mathematics, without decimal point and subsequent numbers. In the notation of 10, integers are usually reserved by rounding.

The application of reserved integers locates integers of different units in population survey, accounting calculation and statistics.

It should be noted that:

1, the integer hundred is also the integer ten.

2,0 is also an integer of 10 and 100.

Reserved percentage is the number calculated in mathematics in the form of integer, without decimal point and the following number. In 10 decimal arithmetic, rounding is usually used to reserve integers.