Answers

Subtract 80/63 from 21/4

1^st number: 5 1/4, 2^nd number: 1 17/63

21/4 - 80/63 is 1003/252.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 4 × 63 = 252,
   21/4 = 21 × 63/4 × 63 = 1323/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   80/63 = 80 × 4/63 × 4 = 320/252
4. Subtract the two like fractions:
   1323/252 - 320/252 = 1323 - 320/252 = 1003/252
5. In mixed form: 3247/252

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