Subtract 27/20 from 27/7
1st number: 3 6/7, 2nd number: 1 7/20
27/7 - 27/20 is 351/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
27/7 = 27 × 20/7 × 20 = 540/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
27/20 = 27 × 7/20 × 7 = 189/140 - Subtract the two like fractions:
540/140 - 189/140 = 540 - 189/140 = 351/140 - In mixed form: 271/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/7-27/20 27/7-54/20 27/14-27/20 27/7-27/40 81/7-27/20 27/7-81/20 27/21-27/20 27/7-27/60 27/35-27/20 27/49-27/20