Subtract 40/98 from 80/81
80/81 - 40/98 is 2300/3969.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 98 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 81 × 98 = 7938,
80/81 = 80 × 98/81 × 98 = 7840/7938 - Likewise, for the 2nd fraction, since 98 × 81 = 7938,
40/98 = 40 × 81/98 × 81 = 3240/7938 - Subtract the two like fractions:
7840/7938 - 3240/7938 = 7840 - 3240/7938 = 4600/7938 - After reducing the fraction, the answer is 2300/3969
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