Subtract 28/8 from 2/5
1st number: 2/5, 2nd number: 3 4/8
2/5 - 28/8 is -31/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
2/5 = 2 × 8/5 × 8 = 16/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
28/8 = 28 × 5/8 × 5 = 140/40 - Subtract the two like fractions:
16/40 - 140/40 = 16 - 140/40 = -124/40 - After reducing the fraction, the answer is -31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-28/8 2/5-56/8 2/10-28/8 2/5-28/16 6/5-28/8 2/5-84/8 2/15-28/8 2/5-28/24 10/5-28/8 2/25-28/8 2/5-28/40 14/5-28/8 2/35-28/8 2/5-28/56