Answers

Subtract 72/28 from 1/42

1^st number: 1/42, 2^nd number: 2 16/28

1/42 - 72/28 is -107/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 28 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   1/42 = 1 × 2/42 × 2 = 2/84
3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
   72/28 = 72 × 3/28 × 3 = 216/84
4. Subtract the two like fractions:
   2/84 - 216/84 = 2 - 216/84 = -214/84
5. After reducing the fraction, the answer is -107/42

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