Answers

Subtract 63/27 from 42/20

1^st number: 2 2/20, 2^nd number: 2 9/27

42/20 - 63/27 is -7/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   42/20 = 42 × 27/20 × 27 = 1134/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   63/27 = 63 × 20/27 × 20 = 1260/540
4. Subtract the two like fractions:
   1134/540 - 1260/540 = 1134 - 1260/540 = -126/540
5. After reducing the fraction, the answer is -7/30

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