Subtract 3/20 from 1/27
1/27 - 3/20 is -61/540.
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,
3/20 = 3 × 27/20 × 27 = 81/540 - Subtract the two like fractions:
20/540 - 81/540 = 20 - 81/540 = -61/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/27-3/20 1/27-6/20 1/54-3/20 1/27-3/40 3/27-3/20 1/27-9/20 1/81-3/20 1/27-3/60 5/27-3/20 1/27-15/20 7/27-3/20 1/27-21/20