Answers

Subtract 8/21 from 72/15

1^st number: 4 12/15, 2^nd number: 8/21

72/15 - 8/21 is 464/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   72/15 = 72 × 7/15 × 7 = 504/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   8/21 = 8 × 5/21 × 5 = 40/105
4. Subtract the two like fractions:
   504/105 - 40/105 = 504 - 40/105 = 464/105
5. In mixed form: 444/105

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