Here we will convert the number 31.21 to a fraction.
31.21 is the same as 31.21/1, because 31.21 divided by 1 is 31.21.
Therefore, we can multiply both the numerator and denominator in 31.21/1 by 100 to get rid of the decimal point and make it into a fraction as follows:
31.21/1 x 100/100 = 3121/100
Then, we simplify the fraction if necessary and we have our answer:
31.21 = 31 21/100
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