Answers

Subtract 70/8 from 20/7

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

20/7 - 70/8 is -165/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 8 is 56
   
   Next, find the equivalent fraction of both fractional numbers with denominator 56
2. For the 1st fraction, since 7 × 8 = 56,
   20/7 = 20 × 8/7 × 8 = 160/56
3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
   70/8 = 70 × 7/8 × 7 = 490/56
4. Subtract the two like fractions:
   160/56 - 490/56 = 160 - 490/56 = -330/56
5. After reducing the fraction, the answer is -165/28

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