Subtract 3/20 from 2/4
2/4 - 3/20 is 7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
2/4 = 2 × 5/4 × 5 = 10/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
3/20 = 3 × 1/20 × 1 = 3/20 - Subtract the two like fractions:
10/20 - 3/20 = 10 - 3/20 = 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/4-6/20 2/8-3/20 2/4-3/40 6/4-3/20 2/4-9/20 2/12-3/20 2/4-3/60 10/4-3/20 2/4-15/20 2/20-3/20 14/4-3/20 2/4-21/20 2/28-3/20