Subtract 1/20 from 3/10
3/10 - 1/20 is 1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
3/10 = 3 × 2/10 × 2 = 6/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
1/20 = 1 × 1/20 × 1 = 1/20 - Subtract the two like fractions:
6/20 - 1/20 = 6 - 1/20 = 5/20 - After reducing the fraction, the answer is 1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10-1/20 3/10-2/20 3/20-1/20 3/10-1/40 9/10-1/20 3/10-3/20 3/30-1/20 3/10-1/60 15/10-1/20 3/10-5/20 3/50-1/20 21/10-1/20 3/10-7/20 3/70-1/20