Subtract 30/81 from 20/60
20/60 - 30/81 is -1/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 60 × 27 = 1620,
20/60 = 20 × 27/60 × 27 = 540/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
30/81 = 30 × 20/81 × 20 = 600/1620 - Subtract the two like fractions:
540/1620 - 600/1620 = 540 - 600/1620 = -60/1620 - After reducing the fraction, the answer is -1/27
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