Subtract 40/70 from 7/98
7/98 - 40/70 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
7/98 = 7 × 5/98 × 5 = 35/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
40/70 = 40 × 7/70 × 7 = 280/490 - Subtract the two like fractions:
35/490 - 280/490 = 35 - 280/490 = -245/490 - After reducing the fraction, the answer is -1/2
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