Whole numbers generally are considered to be non-negative numbers without any fractions or decimal places. Examples of whole numbers are 0, 1, 2, 3, 4 and so on. From a strictly mathematical perspective, there are only three "whole" units and one "partial" unit in the decimal 3.6, so the whole-number portion of 3.6 is 3. But in the real world you don't always get the most accurate results by dropping to the lower number. Decimals usually are changed by rounding to the nearest whole number.
Instructions
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1
Check the first number after the decimal point.
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2
Round up if the number after the decimal point is 5 or greater. For example, the number after the decimal point of 3.6 is "6," so you round up and change 3.6 to the whole number 4.
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3
Round down if the number after the decimal point is 4 or lower. If the number in question had been 3.3, you would have rounded down to the whole number 3.