Answers

Subtract 25/9 from 7/21

1^st number: 7/21, 2^nd number: 2 7/9

7/21 - 25/9 is -22/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 9 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 21 × 3 = 63,
   7/21 = 7 × 3/21 × 3 = 21/63
3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
   25/9 = 25 × 7/9 × 7 = 175/63
4. Subtract the two like fractions:
   21/63 - 175/63 = 21 - 175/63 = -154/63
5. After reducing the fraction, the answer is -22/9

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