Answers

Subtract 27/20 from 12/28

1^st number: 12/28, 2^nd number: 1 7/20

12/28 - 27/20 is -129/140.

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,
   12/28 = 12 × 5/28 × 5 = 60/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   27/20 = 27 × 7/20 × 7 = 189/140
4. Subtract the two like fractions:
   60/140 - 189/140 = 60 - 189/140 = -129/140

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