Subtract 2/5 from 21/98
21/98 - 2/5 is -13/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 5 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Likewise, for the 2nd fraction, since 5 × 98 = 490,
2/5 = 2 × 98/5 × 98 = 196/490 - Subtract the two like fractions:
105/490 - 196/490 = 105 - 196/490 = -91/490 - After reducing the fraction, the answer is -13/70
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