Answers

Subtract 21/9 from 75/54

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

75/54 - 21/9 is -17/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 9 is 54
   
   Next, find the equivalent fraction of both fractional numbers with denominator 54
2. For the 1st fraction, since 54 × 1 = 54,
   75/54 = 75 × 1/54 × 1 = 75/54
3. Likewise, for the 2nd fraction, since 9 × 6 = 54,
   21/9 = 21 × 6/9 × 6 = 126/54
4. Subtract the two like fractions:
   75/54 - 126/54 = 75 - 126/54 = -51/54
5. After reducing the fraction, the answer is -17/18

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