Answers

Subtract 25/21 from 7/54

1^st number: 7/54, 2^nd number: 1 4/21

7/54 - 25/21 is -401/378.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 21 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   7/54 = 7 × 7/54 × 7 = 49/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   25/21 = 25 × 18/21 × 18 = 450/378
4. Subtract the two like fractions:
   49/378 - 450/378 = 49 - 450/378 = -401/378

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