Answers

Subtract 63/20 from 27/28

1^st number: 27/28, 2^nd number: 3 3/20

27/28 - 63/20 is -153/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   27/28 = 27 × 5/28 × 5 = 135/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   63/20 = 63 × 7/20 × 7 = 441/140
4. Subtract the two like fractions:
   135/140 - 441/140 = 135 - 441/140 = -306/140
5. After reducing the fraction, the answer is -153/70

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