Answers

Subtract 30/28 from 15/72

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

15/72 - 30/28 is -145/168.

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,
   30/28 = 30 × 18/28 × 18 = 540/504
4. Subtract the two like fractions:
   105/504 - 540/504 = 105 - 540/504 = -435/504
5. After reducing the fraction, the answer is -145/168

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