Subtract 40/42 from 90/27
1st number: 3 9/27, 2nd number: 40/42
90/27 - 40/42 is 50/21.
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,
40/42 = 40 × 9/42 × 9 = 360/378 - Subtract the two like fractions:
1260/378 - 360/378 = 1260 - 360/378 = 900/378 - After reducing the fraction, the answer is 50/21
- In mixed form: 28/21
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