Answers

Subtract 63/20 from 75/21

1^st number: 3 12/21, 2^nd number: 3 3/20

75/21 - 63/20 is 59/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   75/21 = 75 × 20/21 × 20 = 1500/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   63/20 = 63 × 21/20 × 21 = 1323/420
4. Subtract the two like fractions:
   1500/420 - 1323/420 = 1500 - 1323/420 = 177/420
5. After reducing the fraction, the answer is 59/140

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