Subtract 7/10 from 20/27
20/27 - 7/10 is 11/270.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 10 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
20/27 = 20 × 10/27 × 10 = 200/270 - Likewise, for the 2nd fraction, since 10 × 27 = 270,
7/10 = 7 × 27/10 × 27 = 189/270 - Subtract the two like fractions:
200/270 - 189/270 = 200 - 189/270 = 11/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-7/10 20/27-14/10 20/54-7/10 20/27-7/20 60/27-7/10 20/27-21/10 20/81-7/10 20/27-7/30 20/27-35/10 20/27-7/50 20/27-49/10 20/27-7/70