Subtract 7/20 from 1/2
1/2 - 7/20 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
1/2 = 1 × 10/2 × 10 = 10/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
7/20 = 7 × 1/20 × 1 = 7/20 - Subtract the two like fractions:
10/20 - 7/20 = 10 - 7/20 = 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2-14/20 1/4-7/20 1/2-7/40 3/2-7/20 1/2-21/20 1/6-7/20 1/2-7/60 5/2-7/20 1/2-35/20 1/10-7/20 7/2-7/20 1/2-49/20 1/14-7/20