Answers

Subtract 80/27 from 21/20

1^st number: 1 1/20, 2^nd number: 2 26/27

21/20 - 80/27 is -1033/540.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   21/20 = 21 × 27/20 × 27 = 567/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   80/27 = 80 × 20/27 × 20 = 1600/540
4. Subtract the two like fractions:
   567/540 - 1600/540 = 567 - 1600/540 = -1033/540

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