Answers

Subtract 60/21 from 45/12

1^st number: 3 9/12, 2^nd number: 2 18/21

45/12 - 60/21 is 25/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   45/12 = 45 × 7/12 × 7 = 315/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   60/21 = 60 × 4/21 × 4 = 240/84
4. Subtract the two like fractions:
   315/84 - 240/84 = 315 - 240/84 = 75/84
5. After reducing the fraction, the answer is 25/28

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