Answers

Subtract 21/12 from 40/30

1^st number: 1 10/30, 2^nd number: 1 9/12

40/30 - 21/12 is -5/12.

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,
   40/30 = 40 × 2/30 × 2 = 80/60
3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
   21/12 = 21 × 5/12 × 5 = 105/60
4. Subtract the two like fractions:
   80/60 - 105/60 = 80 - 105/60 = -25/60
5. After reducing the fraction, the answer is -5/12

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