Answers

Subtract 12/54 from 70/21

1^st number: 3 7/21, 2^nd number: 12/54

70/21 - 12/54 is 28/9.

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,
   70/21 = 70 × 18/21 × 18 = 1260/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   12/54 = 12 × 7/54 × 7 = 84/378
4. Subtract the two like fractions:
   1260/378 - 84/378 = 1260 - 84/378 = 1176/378
5. After reducing the fraction, the answer is 28/9
6. In mixed form: 31/9

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