Subtract 42/80 from 7/98
7/98 - 42/80 is -127/280.
Steps for subtracting fractions
- 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 - For the 1st fraction, since 98 × 40 = 3920,
7/98 = 7 × 40/98 × 40 = 280/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
42/80 = 42 × 49/80 × 49 = 2058/3920 - Subtract the two like fractions:
280/3920 - 2058/3920 = 280 - 2058/3920 = -1778/3920 - After reducing the fraction, the answer is -127/280
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