Subtract 28/81 from 1/30
1/30 - 28/81 is -253/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
1/30 = 1 × 27/30 × 27 = 27/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
28/81 = 28 × 10/81 × 10 = 280/810 - Subtract the two like fractions:
27/810 - 280/810 = 27 - 280/810 = -253/810
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