Answers

Subtract 49/40 from 12/63

1^st number: 12/63, 2^nd number: 1 9/40

12/63 - 49/40 is -869/840.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 40 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 63 × 40 = 2520,
   12/63 = 12 × 40/63 × 40 = 480/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   49/40 = 49 × 63/40 × 63 = 3087/2520
4. Subtract the two like fractions:
   480/2520 - 3087/2520 = 480 - 3087/2520 = -2607/2520
5. After reducing the fraction, the answer is -869/840

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