Answers

Subtract 54/7 from 27/20

1^st number: 1 7/20, 2^nd number: 7 5/7

27/20 - 54/7 is -891/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 7 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   27/20 = 27 × 7/20 × 7 = 189/140
3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
   54/7 = 54 × 20/7 × 20 = 1080/140
4. Subtract the two like fractions:
   189/140 - 1080/140 = 189 - 1080/140 = -891/140

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