Answers

Subtract 90/54 from 28/27

1^st number: 1 1/27, 2^nd number: 1 36/54

28/27 - 90/54 is -17/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 54 is 54
   
   Next, find the equivalent fraction of both fractional numbers with denominator 54
2. For the 1st fraction, since 27 × 2 = 54,
   28/27 = 28 × 2/27 × 2 = 56/54
3. Likewise, for the 2nd fraction, since 54 × 1 = 54,
   90/54 = 90 × 1/54 × 1 = 90/54
4. Subtract the two like fractions:
   56/54 - 90/54 = 56 - 90/54 = -34/54
5. After reducing the fraction, the answer is -17/27

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