Subtract 20/27 from 90/42
1st number: 2 6/42, 2nd number: 20/27
90/42 - 20/27 is 265/189.
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,
90/42 = 90 × 9/42 × 9 = 810/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
20/27 = 20 × 14/27 × 14 = 280/378 - Subtract the two like fractions:
810/378 - 280/378 = 810 - 280/378 = 530/378 - After reducing the fraction, the answer is 265/189
- In mixed form: 176/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-40/27 90/84-20/27 90/42-20/54 90/42-60/27 90/42-20/81