Answers

Subtract 25/9 from 21/72

1^st number: 21/72, 2^nd number: 2 7/9

21/72 - 25/9 is -179/72.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 9 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 72 × 1 = 72,
   21/72 = 21 × 1/72 × 1 = 21/72
3. Likewise, for the 2nd fraction, since 9 × 8 = 72,
   25/9 = 25 × 8/9 × 8 = 200/72
4. Subtract the two like fractions:
   21/72 - 200/72 = 21 - 200/72 = -179/72

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