Answers

Subtract 21/80 from 70/98

70/98 - 21/80 is 253/560.

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,
   70/98 = 70 × 40/98 × 40 = 2800/3920
3. Likewise, for the 2nd fraction, since 80 × 49 = 3920,
   21/80 = 21 × 49/80 × 49 = 1029/3920
4. Subtract the two like fractions:
   2800/3920 - 1029/3920 = 2800 - 1029/3920 = 1771/3920
5. After reducing the fraction, the answer is 253/560

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