Subtract 21/98 from 8/70
8/70 - 21/98 is -1/10.
Steps for subtracting fractions
- 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 - For the 1st fraction, since 70 × 7 = 490,
8/70 = 8 × 7/70 × 7 = 56/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Subtract the two like fractions:
56/490 - 105/490 = 56 - 105/490 = -49/490 - After reducing the fraction, the answer is -1/10
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