Answers

Subtract 90/7 from 70/8

1^st number: 8 6/8, 2^nd number: 12 6/7

70/8 - 90/7 is -115/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 7 is 56
   
   Next, find the equivalent fraction of both fractional numbers with denominator 56
2. For the 1st fraction, since 8 × 7 = 56,
   70/8 = 70 × 7/8 × 7 = 490/56
3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
   90/7 = 90 × 8/7 × 8 = 720/56
4. Subtract the two like fractions:
   490/56 - 720/56 = 490 - 720/56 = -230/56
5. After reducing the fraction, the answer is -115/28

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