Answers

Subtract 81/30 from 24/28

1^st number: 24/28, 2^nd number: 2 21/30

24/28 - 81/30 is -129/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 30 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   24/28 = 24 × 15/28 × 15 = 360/420
3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
   81/30 = 81 × 14/30 × 14 = 1134/420
4. Subtract the two like fractions:
   360/420 - 1134/420 = 360 - 1134/420 = -774/420
5. After reducing the fraction, the answer is -129/70

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