Answers

Subtract 70/4 from 20/42

1^st number: 20/42, 2^nd number: 17 2/4

20/42 - 70/4 is -715/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   20/42 = 20 × 2/42 × 2 = 40/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   70/4 = 70 × 21/4 × 21 = 1470/84
4. Subtract the two like fractions:
   40/84 - 1470/84 = 40 - 1470/84 = -1430/84
5. After reducing the fraction, the answer is -715/42

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