Subtract 18/8 from 2/5
1st number: 2/5, 2nd number: 2 2/8
2/5 - 18/8 is -37/20.
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,
18/8 = 18 × 5/8 × 5 = 90/40 - Subtract the two like fractions:
16/40 - 90/40 = 16 - 90/40 = -74/40 - After reducing the fraction, the answer is -37/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-18/8 2/5-36/8 2/10-18/8 2/5-18/16 6/5-18/8 2/5-54/8 2/15-18/8 2/5-18/24 10/5-18/8 2/5-90/8 2/25-18/8 2/5-18/40 14/5-18/8 2/35-18/8 2/5-18/56