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It simply means 45. A decimal number is simply a way of representing a number in such a way that the place value of a one is ten times that of a one in the place to its right. If it does not contain a fractional part then the decimal representation does not require a decimal point.

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7y ago
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7y ago

4/5 as a decimal is 0.8

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Q: What does 45 as a decimal mean?
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