Answers

Subtract 2/15 from 54/21

1^st number: 2 12/21, 2^nd number: 2/15

54/21 - 2/15 is 256/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 15 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   54/21 = 54 × 5/21 × 5 = 270/105
3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
   2/15 = 2 × 7/15 × 7 = 14/105
4. Subtract the two like fractions:
   270/105 - 14/105 = 270 - 14/105 = 256/105
5. In mixed form: 246/105

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