Subtract 8/27 from 20/42
20/42 - 8/27 is 34/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
8/27 = 8 × 14/27 × 14 = 112/378 - Subtract the two like fractions:
180/378 - 112/378 = 180 - 112/378 = 68/378 - After reducing the fraction, the answer is 34/189
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