Here we will convert the number 21.91 to a fraction.
21.91 is the same as 21.91/1, because 21.91 divided by 1 is 21.91.
Therefore, we can multiply both the numerator and denominator in 21.91/1 by 100 to get rid of the decimal point and make it into a fraction as follows:
21.91/1 x 100/100 = 2191/100
Then, we simplify the fraction if necessary and we have our answer:
21.91 = 21 91/100
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