Answers

Subtract 90/63 from 5/72

1^st number: 5/72, 2^nd number: 1 27/63

5/72 - 90/63 is -685/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 63 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   5/72 = 5 × 7/72 × 7 = 35/504
3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
   90/63 = 90 × 8/63 × 8 = 720/504
4. Subtract the two like fractions:
   35/504 - 720/504 = 35 - 720/504 = -685/504

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