Answers

Subtract 15/54 from 84/21

1^st number: 4 0/21, 2^nd number: 15/54

84/21 - 15/54 is 67/18.

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,
   84/21 = 84 × 18/21 × 18 = 1512/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   15/54 = 15 × 7/54 × 7 = 105/378
4. Subtract the two like fractions:
   1512/378 - 105/378 = 1512 - 105/378 = 1407/378
5. After reducing the fraction, the answer is 67/18
6. In mixed form: 313/18

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