Answers

Subtract 90/80 from 25/27

1^st number: 25/27, 2^nd number: 1 10/80

25/27 - 90/80 is -43/216.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 80 is 2160
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2160
2. For the 1st fraction, since 27 × 80 = 2160,
   25/27 = 25 × 80/27 × 80 = 2000/2160
3. Likewise, for the 2nd fraction, since 80 × 27 = 2160,
   90/80 = 90 × 27/80 × 27 = 2430/2160
4. Subtract the two like fractions:
   2000/2160 - 2430/2160 = 2000 - 2430/2160 = -430/2160
5. After reducing the fraction, the answer is -43/216

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