Answers

Subtract 42/28 from 15/72

1^st number: 15/72, 2^nd number: 1 14/28

15/72 - 42/28 is -31/24.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 28 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   15/72 = 15 × 7/72 × 7 = 105/504
3. Likewise, for the 2nd fraction, since 28 × 18 = 504,
   42/28 = 42 × 18/28 × 18 = 756/504
4. Subtract the two like fractions:
   105/504 - 756/504 = 105 - 756/504 = -651/504
5. After reducing the fraction, the answer is -31/24

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