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You do nothing, because 4.5 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 45/10 which can be simplified if required.

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6y ago
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12y ago

Any whole number can become a fraction by putting it over 1.

Any percentage can become a fraction by putting it over 100.

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Q: How do you turn 45 into a fraction?
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