Subtract 20/42 from 90/27
1st number: 3 9/27, 2nd number: 20/42
90/27 - 20/42 is 20/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 42 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
90/27 = 90 × 14/27 × 14 = 1260/378 - Likewise, for the 2nd fraction, since 42 × 9 = 378,
20/42 = 20 × 9/42 × 9 = 180/378 - Subtract the two like fractions:
1260/378 - 180/378 = 1260 - 180/378 = 1080/378 - After reducing the fraction, the answer is 20/7
- In mixed form: 26/7
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