Answers

Subtract 80/42 from 9/63

1^st number: 9/63, 2^nd number: 1 38/42

9/63 - 80/42 is -37/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 42 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 63 × 2 = 126,
   9/63 = 9 × 2/63 × 2 = 18/126
3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
   80/42 = 80 × 3/42 × 3 = 240/126
4. Subtract the two like fractions:
   18/126 - 240/126 = 18 - 240/126 = -222/126
5. After reducing the fraction, the answer is -37/21

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