Subtract 20/30 from 7/98
7/98 - 20/30 is -25/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 30 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 98 × 15 = 1470,
7/98 = 7 × 15/98 × 15 = 105/1470 - Likewise, for the 2nd fraction, since 30 × 49 = 1470,
20/30 = 20 × 49/30 × 49 = 980/1470 - Subtract the two like fractions:
105/1470 - 980/1470 = 105 - 980/1470 = -875/1470 - After reducing the fraction, the answer is -25/42
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