Answers

Subtract 42/20 from 12/54

1^st number: 12/54, 2^nd number: 2 2/20

12/54 - 42/20 is -169/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 20 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 54 × 10 = 540,
   12/54 = 12 × 10/54 × 10 = 120/540
3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
   42/20 = 42 × 27/20 × 27 = 1134/540
4. Subtract the two like fractions:
   120/540 - 1134/540 = 120 - 1134/540 = -1014/540
5. After reducing the fraction, the answer is -169/90

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