Subtract 18/30 from 3/81
3/81 - 18/30 is -76/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
3/81 = 3 × 10/81 × 10 = 30/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
18/30 = 18 × 27/30 × 27 = 486/810 - Subtract the two like fractions:
30/810 - 486/810 = 30 - 486/810 = -456/810 - After reducing the fraction, the answer is -76/135
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