Answers

Subtract 27/49 from 18/80

18/80 - 27/49 is -639/1960.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 49 is 3920
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3920
2. For the 1st fraction, since 80 × 49 = 3920,
   18/80 = 18 × 49/80 × 49 = 882/3920
3. Likewise, for the 2nd fraction, since 49 × 80 = 3920,
   27/49 = 27 × 80/49 × 80 = 2160/3920
4. Subtract the two like fractions:
   882/3920 - 2160/3920 = 882 - 2160/3920 = -1278/3920
5. After reducing the fraction, the answer is -639/1960

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