Answers

Subtract 80/98 from 30/70

30/70 - 80/98 is -19/49.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 98 is 490
   
   Next, find the equivalent fraction of both fractional numbers with denominator 490
2. For the 1st fraction, since 70 × 7 = 490,
   30/70 = 30 × 7/70 × 7 = 210/490
3. Likewise, for the 2nd fraction, since 98 × 5 = 490,
   80/98 = 80 × 5/98 × 5 = 400/490
4. Subtract the two like fractions:
   210/490 - 400/490 = 210 - 400/490 = -190/490
5. After reducing the fraction, the answer is -19/49

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