Answers

Subtract 8/7 from 7/20

1^st number: 7/20, 2^nd number: 1 1/7

7/20 - 8/7 is -111/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 7 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   7/20 = 7 × 7/20 × 7 = 49/140
3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
   8/7 = 8 × 20/7 × 20 = 160/140
4. Subtract the two like fractions:
   49/140 - 160/140 = 49 - 160/140 = -111/140

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