Answers

Subtract 27/42 from 2/20

2/20 - 27/42 is -19/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   2/20 = 2 × 21/20 × 21 = 42/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   27/42 = 27 × 10/42 × 10 = 270/420
4. Subtract the two like fractions:
   42/420 - 270/420 = 42 - 270/420 = -228/420
5. After reducing the fraction, the answer is -19/35

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