Subtract 4/5 from 4/8
4/8 - 4/5 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 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 5 × 8 = 40,
4/5 = 4 × 8/5 × 8 = 32/40 - Subtract the two like fractions:
20/40 - 32/40 = 20 - 32/40 = -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: 4/8-8/5 4/16-4/5 4/8-4/10 12/8-4/5 4/8-12/5 4/24-4/5 4/8-4/15 20/8-4/5 4/8-20/5 4/40-4/5 4/8-4/25 28/8-4/5 4/8-28/5 4/56-4/5 4/8-4/35