Answers

Subtract 20/63 from 2/42

2/42 - 20/63 is -17/63.

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,
   2/42 = 2 × 3/42 × 3 = 6/126
3. Likewise, for the 2nd fraction, since 63 × 2 = 126,
   20/63 = 20 × 2/63 × 2 = 40/126
4. Subtract the two like fractions:
   6/126 - 40/126 = 6 - 40/126 = -34/126
5. After reducing the fraction, the answer is -17/63

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