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put . 45 over 1.

.45/1

move decimal places all the way right to whole numbers

45/100

factor out a 5

5*9/5*20

as 5 appears in both numerator and denominator at least once it can be canceled

9/20

=======simplest form

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11y ago
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Q: How do you make 0.45 into a fraction in simplest form?
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