Answers

Subtract 20/63 from 15/80

15/80 - 20/63 is -131/1008.

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,
   15/80 = 15 × 63/80 × 63 = 945/5040
3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
   20/63 = 20 × 80/63 × 80 = 1600/5040
4. Subtract the two like fractions:
   945/5040 - 1600/5040 = 945 - 1600/5040 = -655/5040
5. After reducing the fraction, the answer is -131/1008

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