Answers

Subtract 21/9 from 6/18

1^st number: 6/18, 2^nd number: 2 3/9

6/18 - 21/9 is -2/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 9 is 18
   
   Next, find the equivalent fraction of both fractional numbers with denominator 18
2. For the 1st fraction, since 18 × 1 = 18,
   6/18 = 6 × 1/18 × 1 = 6/18
3. Likewise, for the 2nd fraction, since 9 × 2 = 18,
   21/9 = 21 × 2/9 × 2 = 42/18
4. Subtract the two like fractions:
   6/18 - 42/18 = 6 - 42/18 = -36/18
5. After reducing the fraction, the answer is -2/1

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