Subtract 18/9 from 2/5
1st number: 2/5, 2nd number: 2 0/9
2/5 - 18/9 is -8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
2/5 = 2 × 9/5 × 9 = 18/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
18/9 = 18 × 5/9 × 5 = 90/45 - Subtract the two like fractions:
18/45 - 90/45 = 18 - 90/45 = -72/45 - After reducing the fraction, the answer is -8/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5-18/9 2/5-36/9 2/10-18/9 6/5-18/9 2/5-54/9 2/15-18/9 2/5-18/27 10/5-18/9 2/5-90/9 2/25-18/9 2/5-18/45 14/5-18/9 2/35-18/9 2/5-18/63