Subtract 3/40 from 5/20
5/20 - 3/40 is 7/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
5/20 = 5 × 2/20 × 2 = 10/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
3/40 = 3 × 1/40 × 1 = 3/40 - Subtract the two like fractions:
10/40 - 3/40 = 10 - 3/40 = 7/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/20-3/40 5/20-6/40 5/40-3/40 5/20-3/80 15/20-3/40 5/20-9/40 5/60-3/40 25/20-3/40 5/20-15/40 35/20-3/40 5/20-21/40