Answers

Subtract 63/21 from 80/4

1^st number: 20 0/4, 2^nd number: 3 0/21

80/4 - 63/21 is 17/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   80/4 = 80 × 21/4 × 21 = 1680/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   63/21 = 63 × 4/21 × 4 = 252/84
4. Subtract the two like fractions:
   1680/84 - 252/84 = 1680 - 252/84 = 1428/84
5. After reducing the fraction, the answer is 17/1

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