Identify rounding rule: Identify the rule for rounding to the nearest whole number: If the decimal is less than 0.5, round down to the previous whole number. If the decimal is 0.5 or greater, round up to the next whole number.
Apply to 0.3: Apply the rounding rule to 0.3: Since 0.3 is less than 0.5, we round down.
Find whole number: Determine the whole number that is just less than 0.3: The whole number immediately less than 0.3 is 0.
Conclude final value: Conclude the final rounded value: Therefore, 0.3 rounded to the nearest whole number is 0.
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