Subtract 42/81 from 10/49
10/49 - 42/81 is -416/1323.
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,
10/49 = 10 × 81/49 × 81 = 810/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
42/81 = 42 × 49/81 × 49 = 2058/3969 - Subtract the two like fractions:
810/3969 - 2058/3969 = 810 - 2058/3969 = -1248/3969 - After reducing the fraction, the answer is -416/1323
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