Answers

Subtract 20/21 from 28/21

1^st number: 1 7/21, 2^nd number: 20/21

28/21 - 20/21 is 8/21.

Steps for subtracting fractions

1. Subtract the two fractions:
   28/21 - 20/21 = 28 - 20/21 = 8/21

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