Answers

Subtract 28/27 from 54/80

1^st number: 54/80, 2^nd number: 1 1/27

54/80 - 28/27 is -391/1080.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 27 is 2160
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2160
2. For the 1st fraction, since 80 × 27 = 2160,
   54/80 = 54 × 27/80 × 27 = 1458/2160
3. Likewise, for the 2nd fraction, since 27 × 80 = 2160,
   28/27 = 28 × 80/27 × 80 = 2240/2160
4. Subtract the two like fractions:
   1458/2160 - 2240/2160 = 1458 - 2240/2160 = -782/2160
5. After reducing the fraction, the answer is -391/1080

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