Answers

Subtract 20/12 from 15/18

1^st number: 15/18, 2^nd number: 1 8/12

15/18 - 20/12 is -5/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 12 is 36
   
   Next, find the equivalent fraction of both fractional numbers with denominator 36
2. For the 1st fraction, since 18 × 2 = 36,
   15/18 = 15 × 2/18 × 2 = 30/36
3. Likewise, for the 2nd fraction, since 12 × 3 = 36,
   20/12 = 20 × 3/12 × 3 = 60/36
4. Subtract the two like fractions:
   30/36 - 60/36 = 30 - 60/36 = -30/36
5. After reducing the fraction, the answer is -5/6

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