Answers

Subtract 7/54 from 30/21

1^st number: 1 9/21, 2^nd number: 7/54

30/21 - 7/54 is 491/378.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   30/21 = 30 × 18/21 × 18 = 540/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   7/54 = 7 × 7/54 × 7 = 49/378
4. Subtract the two like fractions:
   540/378 - 49/378 = 540 - 49/378 = 491/378
5. In mixed form: 1113/378

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