Answers

Subtract 27/20 from 42/10

1^st number: 4 2/10, 2^nd number: 1 7/20

42/10 - 27/20 is 57/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 20 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 10 × 2 = 20,
   42/10 = 42 × 2/10 × 2 = 84/20
3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
   27/20 = 27 × 1/20 × 1 = 27/20
4. Subtract the two like fractions:
   84/20 - 27/20 = 84 - 27/20 = 57/20
5. In mixed form: 217/20

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