Answers

Subtract 40/7 from 20/42

1^st number: 20/42, 2^nd number: 5 5/7

20/42 - 40/7 is -110/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 7 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   20/42 = 20 × 1/42 × 1 = 20/42
3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
   40/7 = 40 × 6/7 × 6 = 240/42
4. Subtract the two like fractions:
   20/42 - 240/42 = 20 - 240/42 = -220/42
5. After reducing the fraction, the answer is -110/21

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