Answers

Subtract 42/4 from 30/21

1^st number: 1 9/21, 2^nd number: 10 2/4

30/21 - 42/4 is -127/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   30/21 = 30 × 4/21 × 4 = 120/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   42/4 = 42 × 21/4 × 21 = 882/84
4. Subtract the two like fractions:
   120/84 - 882/84 = 120 - 882/84 = -762/84
5. After reducing the fraction, the answer is -127/14

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