Subtract 42/98 from 7/70
7/70 - 42/98 is -23/70.
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,
7/70 = 7 × 7/70 × 7 = 49/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
42/98 = 42 × 5/98 × 5 = 210/490 - Subtract the two like fractions:
49/490 - 210/490 = 49 - 210/490 = -161/490 - After reducing the fraction, the answer is -23/70
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