Answers

Subtract 25/54 from 21/15

1^st number: 1 6/15, 2^nd number: 25/54

21/15 - 25/54 is 253/270.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 15 × 18 = 270,
   21/15 = 21 × 18/15 × 18 = 378/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   25/54 = 25 × 5/54 × 5 = 125/270
4. Subtract the two like fractions:
   378/270 - 125/270 = 378 - 125/270 = 253/270

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