Answers

Subtract 7/21 from 35/20

1^st number: 1 15/20, 2^nd number: 7/21

35/20 - 7/21 is 17/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   35/20 = 35 × 21/20 × 21 = 735/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   7/21 = 7 × 20/21 × 20 = 140/420
4. Subtract the two like fractions:
   735/420 - 140/420 = 735 - 140/420 = 595/420
5. After reducing the fraction, the answer is 17/12
6. In mixed form: 15/12

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