Subtract 45/80 from 42/98
42/98 - 45/80 is -15/112.
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,
42/98 = 42 × 40/98 × 40 = 1680/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
45/80 = 45 × 49/80 × 49 = 2205/3920 - Subtract the two like fractions:
1680/3920 - 2205/3920 = 1680 - 2205/3920 = -525/3920 - After reducing the fraction, the answer is -15/112
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