Subtract 20/28 from 1/2
1/2 - 20/28 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 2 × 14 = 28,
1/2 = 1 × 14/2 × 14 = 14/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
20/28 = 20 × 1/28 × 1 = 20/28 - Subtract the two like fractions:
14/28 - 20/28 = 14 - 20/28 = -6/28 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2-40/28 1/4-20/28 1/2-20/56 3/2-20/28 1/2-60/28 1/6-20/28 1/2-20/84 5/2-20/28 1/10-20/28 7/2-20/28 1/14-20/28