Answers

Subtract 63/20 from 45/63

1^st number: 45/63, 2^nd number: 3 3/20

45/63 - 63/20 is -341/140.

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,
   45/63 = 45 × 20/63 × 20 = 900/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   63/20 = 63 × 63/20 × 63 = 3969/1260
4. Subtract the two like fractions:
   900/1260 - 3969/1260 = 900 - 3969/1260 = -3069/1260
5. After reducing the fraction, the answer is -341/140

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