Answers

Subtract 16/63 from 21/80

21/80 - 16/63 is 43/5040.

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,
   21/80 = 21 × 63/80 × 63 = 1323/5040
3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
   16/63 = 16 × 80/63 × 80 = 1280/5040
4. Subtract the two like fractions:
   1323/5040 - 1280/5040 = 1323 - 1280/5040 = 43/5040

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