Answers

Subtract 10/63 from 21/20

1^st number: 1 1/20, 2^nd number: 10/63

21/20 - 10/63 is 1123/1260.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   21/20 = 21 × 63/20 × 63 = 1323/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   10/63 = 10 × 20/63 × 20 = 200/1260
4. Subtract the two like fractions:
   1323/1260 - 200/1260 = 1323 - 200/1260 = 1123/1260

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