Answers

Subtract 21/54 from 21/20

1^st number: 1 1/20, 2^nd number: 21/54

21/20 - 21/54 is 119/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 54 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 54 × 10 = 540,
   21/54 = 21 × 10/54 × 10 = 210/540
4. Subtract the two like fractions:
   567/540 - 210/540 = 567 - 210/540 = 357/540
5. After reducing the fraction, the answer is 119/180

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