Answers

Subtract 35/18 from 12/21

1^st number: 12/21, 2^nd number: 1 17/18

12/21 - 35/18 is -173/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 21 × 6 = 126,
   12/21 = 12 × 6/21 × 6 = 72/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   35/18 = 35 × 7/18 × 7 = 245/126
4. Subtract the two like fractions:
   72/126 - 245/126 = 72 - 245/126 = -173/126

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