Answers

Subtract 15/63 from 6/21

6/21 - 15/63 is 1/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 63 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 21 × 3 = 63,
   6/21 = 6 × 3/21 × 3 = 18/63
3. Likewise, for the 2nd fraction, since 63 × 1 = 63,
   15/63 = 15 × 1/63 × 1 = 15/63
4. Subtract the two like fractions:
   18/63 - 15/63 = 18 - 15/63 = 3/63
5. After reducing the fraction, the answer is 1/21

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