Answers

Subtract 27/21 from 25/72

1^st number: 25/72, 2^nd number: 1 6/21

25/72 - 27/21 is -473/504.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   25/72 = 25 × 7/72 × 7 = 175/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   27/21 = 27 × 24/21 × 24 = 648/504
4. Subtract the two like fractions:
   175/504 - 648/504 = 175 - 648/504 = -473/504

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