Answers

Subtract 81/28 from 42/60

1^st number: 42/60, 2^nd number: 2 25/28

42/60 - 81/28 is -307/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 28 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 60 × 7 = 420,
   42/60 = 42 × 7/60 × 7 = 294/420
3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
   81/28 = 81 × 15/28 × 15 = 1215/420
4. Subtract the two like fractions:
   294/420 - 1215/420 = 294 - 1215/420 = -921/420
5. After reducing the fraction, the answer is -307/140

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