Answers

Subtract 45/12 from 28/30

1^st number: 28/30, 2^nd number: 3 9/12

28/30 - 45/12 is -169/60.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 12 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 30 × 2 = 60,
   28/30 = 28 × 2/30 × 2 = 56/60
3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
   45/12 = 45 × 5/12 × 5 = 225/60
4. Subtract the two like fractions:
   56/60 - 225/60 = 56 - 225/60 = -169/60

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