Answers

Subtract 18/4 from 10/42

1^st number: 10/42, 2^nd number: 4 2/4

10/42 - 18/4 is -179/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   10/42 = 10 × 2/42 × 2 = 20/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   18/4 = 18 × 21/4 × 21 = 378/84
4. Subtract the two like fractions:
   20/84 - 378/84 = 20 - 378/84 = -358/84
5. After reducing the fraction, the answer is -179/42

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