Answers

Subtract 21/12 from 8/30

1^st number: 8/30, 2^nd number: 1 9/12

8/30 - 21/12 is -89/60.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 12 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 30 × 2 = 60,
   8/30 = 8 × 2/30 × 2 = 16/60
3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
   21/12 = 21 × 5/12 × 5 = 105/60
4. Subtract the two like fractions:
   16/60 - 105/60 = 16 - 105/60 = -89/60

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