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c

Step-by-step explanation:

1/3 is actually the ratio between 1 and 3. So "ratio" is kind of equivalent to "divide by", which is why all fractions (of whole numbers) are rational numbers.

C. 0.33... =1/3

Step-by-step explanation:

Ratios can be written 3 different ways and also ratios are also dividing

1 way to write a ratio is 1:3

Another way is 1 to 3

The last way is 1/3