Subtract 7/20 from 1/27
1/27 - 7/20 is -169/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 27 × 20 = 540,
1/27 = 1 × 20/27 × 20 = 20/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
7/20 = 7 × 27/20 × 27 = 189/540 - Subtract the two like fractions:
20/540 - 189/540 = 20 - 189/540 = -169/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/27-7/20 1/27-14/20 1/54-7/20 1/27-7/40 3/27-7/20 1/27-21/20 1/81-7/20 1/27-7/60 5/27-7/20 1/27-35/20 7/27-7/20 1/27-49/20