Answers

Subtract 50/21 from 9/12

1^st number: 9/12, 2^nd number: 2 8/21

9/12 - 50/21 is -137/84.

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,
   9/12 = 9 × 7/12 × 7 = 63/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   50/21 = 50 × 4/21 × 4 = 200/84
4. Subtract the two like fractions:
   63/84 - 200/84 = 63 - 200/84 = -137/84

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