Here we will convert the number 3.15 to a fraction.
3.15 is the same as 3.15/1, because 3.15 divided by 1 is 3.15.
Therefore, we can multiply both the numerator and denominator in 3.15/1 by 100 to get rid of the decimal point and make it into a fraction as follows:
3.15/1 x 100/100 = 315/100
Then, we simplify the fraction if necessary and we have our answer:
3.15 = 3 3/20
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