Subtract 4/20 from 4/8
4/8 - 4/20 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
4/8 = 4 × 5/8 × 5 = 20/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
4/20 = 4 × 2/20 × 2 = 8/40 - Subtract the two like fractions:
20/40 - 8/40 = 20 - 8/40 = 12/40 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-8/20 4/16-4/20 4/8-4/40 12/8-4/20 4/8-12/20 4/24-4/20 4/8-4/60 20/8-4/20 4/40-4/20 28/8-4/20 4/8-28/20 4/56-4/20