Subtract 1/8 from 4/20
4/20 - 1/8 is 3/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
4/20 = 4 × 2/20 × 2 = 8/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
1/8 = 1 × 5/8 × 5 = 5/40 - Subtract the two like fractions:
8/40 - 5/40 = 8 - 5/40 = 3/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-1/8 4/20-2/8 4/40-1/8 4/20-1/16 12/20-1/8 4/20-3/8 4/60-1/8 4/20-1/24 4/20-5/8 4/20-1/40 28/20-1/8 4/20-7/8 4/20-1/56