Answers

Subtract 27/28 from 15/20

15/20 - 27/28 is -3/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 28 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   15/20 = 15 × 7/20 × 7 = 105/140
3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
   27/28 = 27 × 5/28 × 5 = 135/140
4. Subtract the two like fractions:
   105/140 - 135/140 = 105 - 135/140 = -30/140
5. After reducing the fraction, the answer is -3/14

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