Subtract 98/81 from 18/40
1st number: 18/40, 2nd number: 1 17/81
18/40 - 98/81 is -1231/1620.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
18/40 = 18 × 81/40 × 81 = 1458/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
98/81 = 98 × 40/81 × 40 = 3920/3240 - Subtract the two like fractions:
1458/3240 - 3920/3240 = 1458 - 3920/3240 = -2462/3240 - After reducing the fraction, the answer is -1231/1620
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