Answers

Subtract 27/20 from 15/63

1^st number: 15/63, 2^nd number: 1 7/20

15/63 - 27/20 is -467/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   15/63 = 15 × 20/63 × 20 = 300/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   27/20 = 27 × 63/20 × 63 = 1701/1260
4. Subtract the two like fractions:
   300/1260 - 1701/1260 = 300 - 1701/1260 = -1401/1260
5. After reducing the fraction, the answer is -467/420

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