Subtract 2/5 from 15/20
15/20 - 2/5 is 7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
2/5 = 2 × 4/5 × 4 = 8/20 - Subtract the two like fractions:
15/20 - 8/20 = 15 - 8/20 = 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-2/5 15/20-4/5 15/40-2/5 15/20-2/10 45/20-2/5 15/20-6/5 15/60-2/5 15/20-2/15 75/20-2/5 15/20-10/5 15/20-2/25 15/20-14/5 15/20-2/35