Subtract 4/8 from 1/20
1/20 - 4/8 is -9/20.
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,
1/20 = 1 × 2/20 × 2 = 2/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
4/8 = 4 × 5/8 × 5 = 20/40 - Subtract the two like fractions:
2/40 - 20/40 = 2 - 20/40 = -18/40 - After reducing the fraction, the answer is -9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/20-4/8 1/40-4/8 1/20-4/16 3/20-4/8 1/20-12/8 1/60-4/8 1/20-4/24 5/20-4/8 1/20-20/8 1/20-4/40 7/20-4/8 1/20-28/8 1/20-4/56