Answers

Subtract 15/63 from 4/42

4/42 - 15/63 is -1/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 63 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 42 × 3 = 126,
   4/42 = 4 × 3/42 × 3 = 12/126
3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
   15/63 = 15 × 2/63 × 2 = 30/126
4. Subtract the two like fractions:
   12/126 - 30/126 = 12 - 30/126 = -18/126
5. After reducing the fraction, the answer is -1/7

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