Answers

Subtract 72/21 from 20/21

1^st number: 20/21, 2^nd number: 3 9/21

20/21 - 72/21 is -52/21.

Steps for subtracting fractions

1. Subtract the two fractions:
   20/21 - 72/21 = 20 - 72/21 = -52/21

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