Answers

Subtract 18/80 from 42/98

42/98 - 18/80 is 57/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 80 is 3920
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3920
2. For the 1st fraction, since 98 × 40 = 3920,
   42/98 = 42 × 40/98 × 40 = 1680/3920
3. Likewise, for the 2nd fraction, since 80 × 49 = 3920,
   18/80 = 18 × 49/80 × 49 = 882/3920
4. Subtract the two like fractions:
   1680/3920 - 882/3920 = 1680 - 882/3920 = 798/3920
5. After reducing the fraction, the answer is 57/280

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