Subtract 2/81 from 40/49
40/49 - 2/81 is 3142/3969.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
40/49 = 40 × 81/49 × 81 = 3240/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
2/81 = 2 × 49/81 × 49 = 98/3969 - Subtract the two like fractions:
3240/3969 - 98/3969 = 3240 - 98/3969 = 3142/3969
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