Answers

Subtract 90/9 from 63/70

1^st number: 63/70, 2^nd number: 10 0/9

63/70 - 90/9 is -91/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 9 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   63/70 = 63 × 9/70 × 9 = 567/630
3. Likewise, for the 2nd fraction, since 9 × 70 = 630,
   90/9 = 90 × 70/9 × 70 = 6300/630
4. Subtract the two like fractions:
   567/630 - 6300/630 = 567 - 6300/630 = -5733/630
5. After reducing the fraction, the answer is -91/10

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