Subtract 27/16 from 20/28
1st number: 20/28, 2nd number: 1 11/16
20/28 - 27/16 is -109/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 28 × 4 = 112,
20/28 = 20 × 4/28 × 4 = 80/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
27/16 = 27 × 7/16 × 7 = 189/112 - Subtract the two like fractions:
80/112 - 189/112 = 80 - 189/112 = -109/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-27/16 20/28-54/16 20/56-27/16 20/28-27/32 60/28-27/16 20/28-81/16 20/84-27/16 20/28-27/48 20/28-27/80