Answers

Subtract 12/63 from 81/70

1^st number: 1 11/70, 2^nd number: 12/63

81/70 - 12/63 is 29/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   81/70 = 81 × 9/70 × 9 = 729/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   12/63 = 12 × 10/63 × 10 = 120/630
4. Subtract the two like fractions:
   729/630 - 120/630 = 729 - 120/630 = 609/630
5. After reducing the fraction, the answer is 29/30

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