Answers

Subtract 24/54 from 72/21

1^st number: 3 9/21, 2^nd number: 24/54

72/21 - 24/54 is 188/63.

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,
   72/21 = 72 × 18/21 × 18 = 1296/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   24/54 = 24 × 7/54 × 7 = 168/378
4. Subtract the two like fractions:
   1296/378 - 168/378 = 1296 - 168/378 = 1128/378
5. After reducing the fraction, the answer is 188/63
6. In mixed form: 262/63

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