Subtract 9/10 from 81/98
81/98 - 9/10 is -18/245.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 10 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
81/98 = 81 × 5/98 × 5 = 405/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
9/10 = 9 × 49/10 × 49 = 441/490 - Subtract the two like fractions:
405/490 - 441/490 = 405 - 441/490 = -36/490 - After reducing the fraction, the answer is -18/245
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