Subtract 27/28 from 16/20
16/20 - 27/28 is -23/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
16/20 = 16 × 7/20 × 7 = 112/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Subtract the two like fractions:
112/140 - 135/140 = 112 - 135/140 = -23/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/20-27/28 16/20-54/28 16/40-27/28 16/20-27/56 48/20-27/28 16/20-81/28 16/60-27/28 16/20-27/84 80/20-27/28