Answers

Subtract 90/63 from 72/90

1^st number: 72/90, 2^nd number: 1 27/63

72/90 - 90/63 is -22/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   72/90 = 72 × 7/90 × 7 = 504/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   90/63 = 90 × 10/63 × 10 = 900/630
4. Subtract the two like fractions:
   504/630 - 900/630 = 504 - 900/630 = -396/630
5. After reducing the fraction, the answer is -22/35

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