Subtract 4/20 from 1/2
1/2 - 4/20 is 3/10.
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,
4/20 = 4 × 1/20 × 1 = 4/20 - Subtract the two like fractions:
10/20 - 4/20 = 10 - 4/20 = 6/20 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2-8/20 1/4-4/20 1/2-4/40 3/2-4/20 1/2-12/20 1/6-4/20 1/2-4/60 5/2-4/20 1/10-4/20 7/2-4/20 1/2-28/20 1/14-4/20