Answers

Subtract 8/63 from 42/80

42/80 - 8/63 is 1003/2520.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 63 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 80 × 63 = 5040,
   42/80 = 42 × 63/80 × 63 = 2646/5040
3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
   8/63 = 8 × 80/63 × 80 = 640/5040
4. Subtract the two like fractions:
   2646/5040 - 640/5040 = 2646 - 640/5040 = 2006/5040
5. After reducing the fraction, the answer is 1003/2520

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