21 as a Decimal

Professor Greenline Explaining Math Concepts

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It is a simple question on decimal conversion. To understand decimals, one must first comprehend the concept of whole numbers and fractions. A whole number is a complete entity without any fractional or decimal component. A decimal, on the other hand, represents a part of a whole number, using a decimal point (.) to separate the whole part from the fractional part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.

What is 21 as a decimal?

$21 as a decimal$

Answer

21 as a decimal is simply written as 21.0. It is not a recurring or repeating decimal; it is a whole number with no fractional part.

Explanation

To express 21 as a decimal, consider the number itself. Since it has no fractional part, it can be represented as 21.0 in decimal form.

Step 1: Identify the whole number, which in this case is 21.

Step 2: Recognize that there is no fractional component to convert; thus, the decimal representation is straightforward.

Step 3: Write 21 with a decimal point followed by a zero to indicate the absence of a fractional part, resulting in 21.0.

The process is simple since the number is already whole, and adding .0 confirms its decimal identity.

Important Glossaries for 21 as a decimal

Whole Number: A number without fractions or decimals, representing a complete quantity.
Decimal: A number that includes a decimal point, separating the whole part from the fractional part.
Fraction: A numerical quantity representing a part of a whole, expressed with a numerator and a denominator.
Numerator: The top part of a fraction, indicating how many parts of the whole are being considered.
Denominator: The bottom part of a fraction, showing how many parts make up a whole.