Answers

Subtract 20/21 from 2/12

2/12 - 20/21 is -11/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   2/12 = 2 × 7/12 × 7 = 14/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   20/21 = 20 × 4/21 × 4 = 80/84
4. Subtract the two like fractions:
   14/84 - 80/84 = 14 - 80/84 = -66/84
5. After reducing the fraction, the answer is -11/14

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