Answers

Subtract 9/7 from 63/72

1^st number: 63/72, 2^nd number: 1 2/7

63/72 - 9/7 is -23/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 7 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   63/72 = 63 × 7/72 × 7 = 441/504
3. Likewise, for the 2nd fraction, since 7 × 72 = 504,
   9/7 = 9 × 72/7 × 72 = 648/504
4. Subtract the two like fractions:
   441/504 - 648/504 = 441 - 648/504 = -207/504
5. After reducing the fraction, the answer is -23/56

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