Subtract 70/98 from 20/40
20/40 - 70/98 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 98 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
20/40 = 20 × 49/40 × 49 = 980/1960 - Likewise, for the 2nd fraction, since 98 × 20 = 1960,
70/98 = 70 × 20/98 × 20 = 1400/1960 - Subtract the two like fractions:
980/1960 - 1400/1960 = 980 - 1400/1960 = -420/1960 - After reducing the fraction, the answer is -3/14
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