Answers

Subtract 27/21 from 2/18

1^st number: 2/18, 2^nd number: 1 6/21

2/18 - 27/21 is -74/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   2/18 = 2 × 7/18 × 7 = 14/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   27/21 = 27 × 6/21 × 6 = 162/126
4. Subtract the two like fractions:
   14/126 - 162/126 = 14 - 162/126 = -148/126
5. After reducing the fraction, the answer is -74/63

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