Answers

Subtract 16/21 from 24/54

24/54 - 16/21 is -20/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 21 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 54 × 7 = 378,
   24/54 = 24 × 7/54 × 7 = 168/378
3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
   16/21 = 16 × 18/21 × 18 = 288/378
4. Subtract the two like fractions:
   168/378 - 288/378 = 168 - 288/378 = -120/378
5. After reducing the fraction, the answer is -20/63

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